Episode 3 Camshafts for the Royal Enfield 650 Twin

From theory to installation and performance gains.
How valve trains work and why we make changes to optimise performance. We breakdown your options, cost, complexity of installation and what sort of results you can expect from changes to the camshafts and high compression pistons on a Royal Enfield Twin 650.
Time Stamps:
0:00 Opening
0:11 Intro and Updates
1:47 Components of a valve train and how it functions
2:43 Camshaft design
3:46 High Performance Options
4: 47 Installation of camshaft
6:55 (High Compression Pistons)
7:51 Installation of camshaft
8:35 Results - What to expect
10:45 Wrap up, next week's topic & secret reveal
Specs:
Stock cam lift (measured)
IN = .258” EX = .262"
Stock valve lift IN = .305” EX = .310”
S&S cam lift (measured)
IN = .296” EX = .299"
S&S valve lift
IN = .350” EX= .354”
S&S Stated "Peak" Cam Lift .299" - "Peak" Valve Lift .354"
RA Ratio = 1.184
S&S increase in lift
IN = .045” EX= .044”
Links:
Shop for camshafts here:
shop.revelryracing.com.au/prod...
Shop for High Compression Pistons here:
shop.revelryracing.com.au/prod...
Animations of 4-Stroke engine
animagraffs.com/how-a-car-eng...
• 4 Stroke Engine Workin...
DISCLAIMER:
MANY OF THE PRODUCTS WE DISCUSS ARE “RACE ONLY”
ALL RACE ONLY PRODUCTS ARE FOR CLOSED COURSE COMPETITION USE ONLY. SOLD FOR RACING VEHICLES WHICH ARE NEVER USED ON, OR REGISTERED FOR USE ON, A PUBLIC ROADWAY.
NO RACE ONLY MODIFICATIONS ARE STREET LEGAL IN AUSTRALIA.
IT IS YOUR RESPONSIBILITY TO CHECK YOUR LOCAL REGULATIONS.

[@BlueRidgeRider]

I just discovered your videos today! WOW! They are outstanding. The only downside is you are encouraging me to spend money.

[@brockett]

Interesting and educational with a timely reminder that "DIY" ( Do It Yourself) may also mean "Destroy It Yourself" and a Pro workshop can be less expensive in the long run.

[@TheEnfieldGuy]

Whoaaaa....watch until the end folks....BIG news!!!

[@RevelryCycles]

😃👍🏻

[@Mick6661320]

Watch and learn. Excellent series of videos.

[@2WHEELSor2WINGS]

Really clear. Love the fact you show power graphs, not just spout opinions. Thank you. Graham. 😎

[@out_rising2078]

I really love these videos, no one else on youtube goes into as much detail as you guys, and your visual examples are amazing. As someone who has just bought one of these bikes, you're literally explaining the internals of it for me! Thanks guys!

[@marcoliver9329]

Love the level of detail you provide and the honest % improvements one can expect to see with various mods. Keep it up!!!

[@toubutey]

Loving this series! Thank you!

[@hemantv.5409]

Your programms are always very informative

[@WaterDR-tw8re]

My RE mechanic quoted me $195 to install my cam. I find you data interesting and a lot has been learned about these cams since. Stock bike, I am seeing 50 hp with these cams and a tuner. 55 with a stage 2 cam.

[@stevegoodwin5841]

Bloody awesome vid guys!

[@rajdicdicholkar2741]

Just what I was looking for on KZbin. Very informative. stupendous effort. All the best 👌👍

[@drhunter1117]

Excellent video. Really informative!

[@anotsheringjourney3755]

Thanks for the info 🙏 you guys are doing good keep it up guys ...love to see more from you guys 👍

[@1mxtreme]

Extremely informative & detailed to a point of practicality....awesome job guys...

[@iamdevilsiladitya]

Great work hoping to see lot more videos like it, brake upgrade will be a nice thing to watch. Love from India ❤️

[@miltondesilva542]

Thanks for your efforts.My mind is spinning with possibilities from across the ditch.

[@bahemut0]

I appreciate these vids tremendously. As a new rider the insight into the goings on between my legs is invaluable.

[@inakigoenaga9811]

Great video, as always.

[@luiscosta7253]

Thanks for your videos. I am seeing you with great interest on the other side of planet Earth (Portugal).

[@austinparker8539]

Just picked up a new 2023 Enfield 650. Love these videos super helpful!

[@stevesanelli90]

Just subscribed & really enjoying your fun nature, knowledge, expertise & appreciate your time. Next time I’m in Sydney, I think I’ll pass by. All the best for Christmas & the New Year! Keep up your great work!👌💯🏍🚀

[@hunkass3982]

you guys earned my respect

[@ursdummy0o0]

Commendable presentation and enthusiasm with loads of real information 👍 (knowing the information shared isn't limited to RE interceptors only, it's applicable in other models/makes too)

[@chriscoates2399]

Yes I learned some stuff while you where explaining But it's all NEW so hard to retain But really enjoyed it ..... Thanks People

[@allsearpw3829]

Another very interesting in depth video , I have never heard any thing like this in years , Bill Bud back in the 1960 ,s at our youth club who use to come in and teach motor cycle tune ups .I think he was an ex TT I.O.M. ENGINEER . Not forgetting Marsh and Fry in our town who raced at the TT . Brings back sad memories of my late dads R.E 500 twin that blew the engine twice and was relergated to the roof in our bungalow for about 12 years ,before being sold as parts to fund my first bike . Keep it up and thanks for the education of old days passed .

[@beaumas]

really awesome videos!! you guys really answer all the questions I would really want to ask

[@TheStig.]

Very good and informative video

[@iris-studios]

you explained the stock and modified setup perfectly at the end there. great job, my 650 Intercepter is getting slip-ons, BMC filter, Powertronics ECU but now l wanna get the cams done too!! lol

[@royharrison3764]

Excellent, thanks guys.

[@pgansz]

Enjoy your videos a lot. Good to see some decent, honest folks wrenching!

[@RevelryCycles]

Thanks 👍

[@kevansimister3967]

Can’t fault them brilliant and give us the information we need

[@thunderstruckperform]

Always informative and entertaining keep up the great work

[@RevelryCycles]

Thank you very much 😃

[@nelsonthekkath4830]

Excellent video. Keep it up. All the best. 🥰🥰

[@jam42652]

Your videos are SO GOOD. Thank you

[@Beanerds]

Since I just picked up my 2021 Interceptor 650 3 weeks ago and love it , I have since changed out the exhaust I can feel the engine wants more , air filter next , a K&N probably , cheaper here in Perth . Thanks guys for your channel , its what Australia needs as these bikes are awesome and very popular . ps. I am an engine builder at home ( Mopar ) and a Fitter welder by trade , so yes the S&S cam shaft is on the cards .

[@michaelahern3006]

Wish all these quality performance parts were commonly available for my W650. Enjoying the vids.

[@misterceptor]

Excellent videos guys. You definitely deserve more subs

[@RevelryCycles]

Thanks very much!

[@ArjunSingh-he6ir]

Really nice videos keep it up👍👍

[@MrFaciolito]

Thanks for your work.

[@nikitis13]

Nice wheelie Will.

[@RevelryCycles]

Will can wheelie anything! 😂

[@noorzoommuhammed]

Perfectionists

[@TheClassicMotorcycleChannel]

Great video :)

[@DEeMONsworld]

I've put cams in other bikes, but when I realized some time ago that you have to change the spring shims on this one, and probably while your at it do porting , (since it should be removed) unless you use the compressed air technique, I decided not to for go that mod since I don't have a shop any more and live in the provinces of the Philippines. (that just means I can't just run out and get parts easily) . Great reality check for those inexperienced would be do it yourself types, and you make a valid point to seek professional help on this kind of mod for the RE.

[@neti_neti_]

बहुत सुन्दर प्रस्तुति।

[@RevelryCycles]

धन्यवाद

[@gua2june]

I am excited to see 965. Very informative video and feels good to see you guys assembling an engine . Requesting you guys if you can develop and accommodate a turbo. I am interesting to know the modification required to build a 650 with a turbo.

[@aldoileanumeliber]

nice work! subbed

[@ATOMICookie]

lovely video yall!

[@RevelryCycles]

Thank you

[@rafaelbin4595]

Hello! Amazing video!

[@ruahinesrider]

Got my vote peaked my interest.👍🏍️

[@b_mochannel4266]

Interested channel 👍🏼👍🏼

[@klang01234]

⏳Waiting for one......

[@dusty.toby_]

Love your videos and all the informations about the 650 interceptor :D Im struggling on what to do, my first thought was to stay with the stock...now im dreaming of the S&S camshaft and new set of exhaust..the big bore kit would be awesome but illegal in italy LoL XD But i think 6to8% HP will give a nice funny push to my Indie, and that's all for me. Greetings from Sicily :D

[@shabeeirshaik6087]

Nice content and very helpfull to my work please try to upload the full assembly of 650 twin engine ❤️❤️❤️❤️

[@abdullakhan4411]

That wasn't a surprise guys. You just dropped a nuke. So you making me rethink my 865 project 😄

[@anilmohani7845]

"Masterclass"❤️❤️❤️

[@stonecold2653]

Great Content

[@RevelryCycles]

Thanks!

[@MotorcyclistDiaries]

Nice video thank you for sharing knowledge. One question remains: Do you make the same characteristic camshaft for Himalayan? Thank you!

[@ssreeni00]

WOW for the shock......

[@MrMbragg]

Still enthralling stuff guys - when do you start pondering bigger/additional braking in this journey of increased power...... or am I getting ahead of myself..???

[@alwalsh1384]

Enjoy your presentations...Its a pity there are no folk like yourselves up here in Brisbane. Would like to go the 650 HC slugs , cam and tuner road, but I seem to hit a blank wall with dealers up here. Ive just spent the kids inheritance on suspension, so I'm now comfortable going a bit quicker in the hills.

[@RevelryCycles]

Hey Al, we've got a few folks sending the bikes down for us to do the work.

[@robertzcolney6506]

@@RevelryCycles Please help me, i had a RPM problem on my 650 twins, when i start my bike the rpm goes increase and decrease up and down..what will be the issue of my problem...

[@RevelryCycles]

@@robertzcolney6506 We are not going to diagnose motorcycle issues on KZbin comments. If you have an issue you need to take it to a qualified technician and have it properly diagnosed and repaired. If you’re in Australia and would like us to do this for you I’d be happy to book an appointment for you in our workshop.

[@rbrboulet]

I love your videos! I hope to get a continental GT soon! Why haven’t y’all uploaded in the last year if I may ask?

[@G-Force_70]

Guys great video, what please are the HP and torque ratings for the upgraded cam and High Compression pistons

[@manasparekh1230]

Another great video. Can you make content on the super Meteor 650? Performances mods in particular. Cheers

[@peterjovanovski7609]

great series of vids peeps. i hope the public appreciates the time and effort you two put into the videos. can i swap you a toasted vegemite sandwich for a ......... kit :-) (sorry) well done, love your work !

[@RevelryCycles]

Maybe take out the details in your comment so you don't ruin the surprise for everyone. :-)

[@RevelryCycles]

Thanks Peter! Love your enthusiasm and appreciate the feedback :-D

[@davidquoniou283]

hello, very interesting video, thank you. really, big surprise !!!! MAY THE FORCE BE WITH YOU . ;-)

[@RevelryCycles]

Maybe take out the details in your comment so you don't ruin the surprise for everyone. :-)

[@davidquoniou283]

@@RevelryCycles YES ! vous avez raison

[@carlomac]

@Revelry Cycles - Thanks for the great video, really enjoying your knowledge sharing. I think a lot of people like myself really want to know more about how their motorcyles work. Does the S&S cam make the bike sound any different? Cheers!

[@RevelryCycles]

Yes. There is a bit of added lope at idle. If you add compression it changes it further as it revs much quicker

[@MeAndMyRoyalEnfield]

My first time here. Brillant video! I like stock original and not interested in going for more power unless it translates into better gas mileage and longer engine life. Do you have numbers on gas mileage? Just finishing a ten week 5,000 mile trip and I Love My Royal Enfield INT 650!! Thanks for what you are doing.

[@abhinavsnair7689]

I just installed the s and s camshaft for my interceptor 650...i have already installed it with a dna airfilter, mufflers, powertronics piggyback ecu and a quickshifter. The bike now has a big idling problem when the engine is hot. Whenever i try to crank the engine it just struggles to start and quickly dies but the problem is not present at cold starts .The low end is also unusally jerky and jittery...but the bike pulls clean after 4k rpm.I am currently using a fuel map for the s and s mufflers and cam with air cleaners...i dont seem to understand what the real issue is.....any advice would be grateful

[@wfdTamar]

Maybe worth mentioning the tradeoffs (negatives) for the mods - How much they affect emissions, fuel consumption and noise? Right, I've pinned the accent - Dennis Weaver (McCloud).

[@flyboyfs]

Hi good job! I am thinking to swap my cam to a stage 1,and I like to know the power gains with dynojet comand, and free-flowing exh. do you have any data on this? I did see on stage 2 one that performance around 55 hp on wheel. Thanks in advance

[@juanbujas7170]

Gracias por la explicación. Una consulta, si se cambia el árbol de levas es necesario reprogramar la ECU para qué haya más combustible? Saludos

[@RevelryCycles]

Yes

[@TheRazahmed]

Hi , nice detailed info. Would we need to upgrade the springs for reliability, with a higher lift cam. Or would the shims take care of it

[@RevelryCycles]

Unless you're expecting to go WELL out beyond the stock rev limit, the shims supplied with the kit are plenty.

[@davidwright7195]

Great videos, very informative. If you don't want to go a big bore kit, what do you guys think are the best high compression pistons to get?

[@RevelryCycles]

shop.revelryracing.com.au/product/high-compression-111-piston-kit-for-royal-enfield-650-twins/

[@joec1995jc]

This is the only place on the internet I have found any amount of stock cam specs. You guys wouldn't happen to have the duration specs on hand would you?

[@sourav6339]

💯

[@srinivaskirthy]

At 4:38 - are the timing specs for stock cam or S&S cam?

[@themoniMbarman]

Love your content. Advice you to pls improve the audio levels.

[@guywihn1658]

My guess is you'll swap out the stock crank for one having an approximately 4mm longer throw (8mm longer stroke) and use the 865 90mm bore to a get your 965?

[@RevelryCycles]

Hmm... Interesting... stay tuned... we’ll see!

[@klang01234]

No new videos coming up on the 965 that you mentioned?

[@simonrasmussen2345]

I know enough about this stuff to appreciate the logical sequence of episodes, the level of detail including the props and hands on demonstrations that I appreciate the quality and value of what you are doing. You do need to work on developing proper Aussie accents though! well done!

[@sd3457]

If one was going to go to the bother of the dismantling involved in fitting the cam, is it a case of you may as well do the high-compression pistons while you're at it?

[@RevelryCycles]

That would be more efficient than opening it up twice.

[@hemantv.5409]

What is the cost of improved camshaft

[@JeffGillis1]

I’m in Reno, I wish you guys were local. Is it possible to buy a big bore twin as a fully built crate motor?

[@RevelryCycles]

Hey Jeff (Santina here) I grew up in Northern NV, I know Reno well. Can do a crate motor but it’s pretty cost prohibitive. If you’re seriously considering it please email [e-mail]

[@kencohagen4967]

I wish you were in the states. I’m sure I can find a competent machine shop, but none with experience in the stuff you do!

[@avinashchakravarthy162]

Hello I'm planning to install s&s cam on interceptor 650, I already have installed slip-on, DNA air filter, and powertronic piggyback ECU. If I install S&S camshaft with these already installed, do I need to install any custom map on the powertronic ECU or stock powertronic ECU maps will do the job? I asked several leads I had but it is of no use.

[@RevelryCycles]

The default map that comes with the powertronic will generally suffice. It will almost certainly run just fine. Of course to get the best performance you'll need to tune each bike, preferably on a dyno.

[@avinashchakravarthy162]

@@RevelryCycles Thank you!

[@abhinavsnair7689]

@@RevelryCycles I've installed the s and s cams along with the dna airfilters and mufflers with the powertronic piggyback ecu and quickshifters.The bike is now having a major idle problem when the engine is heated,when i crank the engine the engine it struggles to start and quickly dies... also there is a lot of jerkiness and jitters at the low end.I cant really find what the problem is actually......any advice would be great

[@-thirteen]

curious to know what the cost for installing this cam would be for most shops

[@RevelryCycles]

Labour times are discussed in the video

[@pradeepkummu1917]

👌👌👌👌👌👌👌👌👌👌👌👍👍👍👍👍👍👍👍❤❤❤❤

[@thamenfield2102]

excuse me. I ask you please why used a bolts head cylinder one time only mounting cylinder block because

[@baconxuranha7072]

hello, could you please measure someway the stock cam's duration and timing?

[@RevelryCycles]

It's right there in the video mate. 4 minutes 27 seconds in.

[@andrewbull3537]

Do you sell the drag pipes that are on the enfield behind you in the video ???? If so ,how much ????........Excellent video (yeah i know,...stop creeping!!!!) See you later, take care on the road 👍👍👍

[@RevelryCycles]

Sure but they are not appropriate for street use. The price is similar to our headers and vary if you want them ceramic coated.

[@hunkass3982]

what about the engine heating in 865 comparing with stock??

[@RevelryCycles]

Don’t get ahead of the episodes Hank 😂 all in good time

[@hunkass3982]

@@RevelryCycles yeah yeah... keep up the good work

[@abdullakhan4411]

" When you add compression " do you mean installing a set of high compression pistons???

[@RevelryCycles]

Yes we discuss high compression pistons if you watch the video

[@vichu650]

Do u have 650 engine dismantle and assembly video??

[@RevelryCycles]

Nope

[@vichu650]

@@RevelryCycles can u make it....??

[@RevelryCycles]

@@vichu650 it’s unlikely that we will ever do a video like that.

[@MrTriple3]

Thanks for another great video. However, I wonder if you might turn your attention to the audio. It's not up to the high standards you hold on other aspects of your presentations.

[@RevelryCycles]

Thank you for the gentle suggestion. You are not the first to mention it Mr T. We've had a bad run with mics and have today got a fancy new one for this weeks video. Fingers crossed it behaves and you'll be able to hear the melodious sounds of our voices. :-)

[@TheMudslug]

Hi have you ever done builds for export.

[@RevelryCycles]

Sure we've built engines for folks around the globe. I wouldn't want to try a whole motorcycle as the import would be too difficult in most countries.

[@gcrichlow17]

Any updates on the 965?

[@RevelryCycles]

Yep, but we're not ready to share yet! 😉

[@overbuiltautomotive1299]

or get a Delta cams regrind is always an option

[@klang01234]

Is there a difference between the Pistons that come with the 865 kit and the high compression pistons that are mentioned separately on the website? Are they the same

[@RevelryCycles]

Yeah big difference. The High Comp are for a 650.

[@klang01234]

@@RevelryCycles so they don't fit in the 865 kit? I mean which ones are the best to be fitted in 865 kit..... The ones that come with the kit or the high compression ones that are mentioned separately.

[@RevelryCycles]

@@klang01234 no they are not interchangable.

[@klang01234]

@@RevelryCycles ok thanks🙏❤

[@vemullamani7112]

Sir I live India I want to buy Royal Enfield interceptor 650 but I don't have enough money for bike . It's 3 year's of dream to buy Royal Enfield interceptor 650 but I can't so I fullfill my dream by seeing videos