BIGBORE Ms661 Forged piston 58mm Bolt on kit!! Finally Here!!!

[@joshruka4650]

Sure is a nice sounding saw on and out of the cut. Keep up the awesome work and videos 👍

[@scottwilson4396]

Awesome to see there is some business’s willing to help you on these sick Projects Dyno Joe ! Really enjoyed the 51m 572 you did the sleeve on , the mark 2 562 would be one i think could get some traction with a bore bump ! Keep up the great work Sir 🤓💪🏿💪🏿

[@Magoot2456]

Im making this comment 50 seconds in and making a prediction that this saw with a 58mm wiseco is going to be a MONSTER! :) i love your videos man!!!!

[@dynojoemods2764]

Thank you!

[@IowaPerformanceSaws]

Nice work Joe!!! Best of luck with these- I bet people go nuts for them!

[@mattw5729]

Excellent job thank you! Would like to see one for the 046 someday!

[@forrestebert5276]

I’m very interested in this kit for my 661. I’ll be in touch with you real soon.

[@coxsaws]

Sweet running saws

[@Carboneye7]

Man that thing sounds killer and it really eats

[@tatepazaski5488]

Way to go Joe!! Im always impressed.

[@mrfirewood6215]

Joe, you should get in touch with Gordy at west coast saws

[@johnclarke8180]

Your a mad man Joe! Your awesome brother!! Keep it up please!!

[@richardf9137]

SWEET!

[@carlhall9582]

To be completely honest it sure seemed like the stock saw was running good on the square log , but was definitely running like crap when it started in the round log . I was calling a fowl before you mentioned it a couple of times later. So I guess I still have to call a foul.

[@dynojoemods2764]

It just wanted to stay on the rich side, even after the reset. I'll have to try and find some carb saws too see how they act

[@lanceuselton3124]

Thanks Joe for all the time you put in and make data available. You are the first bolt on ported one size fits all that I would trust. Just the fact you have a place doing plating is huge. That was a pretty big gain for a saw that will only get stronger for the next 5 gallons run through it. As a work saw the gain with a long bar 36" and above I'm sure will be even more noticeable. Thanks will be giving you a call soon about plating SP 125 cylinders

[@coreycorp7048]

Cool stuff.

[@julianlaustsen1991]

would be cool with bigbore for the 500i aswell

[@Super-Dave-Outdoors]

357xp 46mm to 48mm 365 bore would be cool. Dont have one but that would be a nice package. 372 50mm to 52 or 54mm

[@anohoze]

You can also get a cast piston from wiseco right? If I think correctly, the set could be cheaper

[@Larry-hi1ri]

I got a Echo 620 can I buy a big bore kit for it something I might can do myself if I ever get the money I would love for you to port and polish it not bad stock 28” bar great videos

[@wayneharper87]

I recently did a 390xp big bore, wolfcreek are the only ones that sell it, would b awsome to see u do one

[@dynojoemods2764]

If they already have a big bore available i won't be able to come close in price. Im hoping to do some that are not available aftermarket yet. Or smaller saws that could fit the larger pistons already.

[@wayneharper87]

@@dynojoemods2764 icic understood

[@jimssawsnstuff8903]

@@dynojoemods2764 Something for the Stihl ms462 that gives them some torque would be good! Their stock numbers are pretty decent, but they just don’t make torque…I think it’s mostly due to the lean air/fuel mix by the m-tronic, but either way, they sure need some help…🤔🫣

[@fabzacres-blackcat]

@@jimssawsnstuff8903I’d say they suffer more from a lack of AIR flow stock. I did a Hotwoods build on a 462c a few years ago with a tuned intake / exhaust that absolutely Rip-skis - a real head cutter that’ll make your big toe shoot up in your boot !

[@jeremydawkins8399]

Man i wish this was for the 066!

[@videocardzrule354]

Are there any big bore options for a Stihl 261?

[@justinweaver8107]

Very cool ❤

[@fabzacres-blackcat]

Solid 15% gains in cut speed in the timber - that’s a healthy gain for a bolt-on product! As long as you keep the QC in the USA 🇺🇸 you’re golden. I recall someone marketing a “cross performance” 660 cylinder awhile back but the QC was horrendous and they didn’t pass the test of time. Sum Ting Wong laid an egg 🍳

[@Mightycaptain]

500i for sure.

[@jasonlamar2053]

Curious how the single ring Wiseco will hold up in that cylinder, vs the stock 2 ring, particularly with that coarse cross-hatch.

[@dynojoemods2764]

They may take a while to seat in, but the steel ring should hold up really well with these more mild port shapes.

[@shawncaudill424]

I would absolutely love to see the 395 husky big boar setup by you. That would be amazing. I would definitely be interested?

[@tomyousch7070]

Me too, a395 big bore would be appreciated very much

[@aussiehardwood6196]

But could you handle a 395 big bore? Sometimes we mix up our ambitions with our capabilities.

[@PurpleNovember]

How would it hold up for milling? Worth testing or would it just run too hot? Will a non-ported or very conservative ported big bore kit be available? I’d like to see 500i, 400C, and 261CM. I think a 261 would be great one to do next because it’s so lightweight and cost significantly less than the other pro models, there’s also a bunch of them out there.

[@dynojoemods2764]

Should be ok milling. Maybe a little extra muffler outlet. Would be great on the carb models too. Problem with some of the strato saws is piston availability. Custom ones would be very very expensive

[@PurpleNovember]

@@dynojoemods2764 I was thinking the same thing about the pistons and I was thinking about tuned exhaust for milling. We’re using a 500i for milling and it works well but we need to step up to a 661 or 881. The 661CM is preferred because of the m-tronic and same bar mount as our other Stihl saws. We can also pick up well used 661’s pretty easily for a cheap price. If I’m rebuilding the entire saw it’s easy enough to put a big bore jug on it.

[@KAMP8505]

Stocker doesn’t sound like it’s running right now

[@dynojoemods2764]

It is definitely staying a bit rich. I have tried the resets etc on it. Might just need some more run time to learn. Sometimes the dyno pulls effect the tuning until they get back into the wood.

[@ryangerbers7419]

Stihl 462 next ?

[@MateuszBPM]

Hi Joe, wiseco only makes sets for larger chainsaw models, or for smaller ones too😊🤔

[@dynojoemods2764]

All of the saw pistons from wiseco are custom designs. Most of the designs are bought/sold through 1-2 dealers. The guy I am working with will have pistons available for lots of different saw sizes 50-120cc

[@TsunauticusIV]

Used to run wiseco pro-lite pistons in my Yamaha Banshees back in the day. Never had issues with wiseco products. Should do you guys good.

[@HairlipButcher]

​@@TsunauticusIVused to run them back in the day in the yamaha phazers. A simple port polish with them pistons, a aaen pipe and clutching. Them little light sleds were rippers.

[@JoviParagon]

Currently I have Wiseco chainsaw pistons in stock from 42mm to 66mm. In general developing a new model takes 8 months or longer.

[@saltymofo5870]

Both saws sound a bit rich, the stock more so.

[@JMB676]

So are you saying you can or you have someone that can put a steal sleeve in any cylinder if I so wanted to do so? Jw cause I have a couple motors I would like to do that to.

[@dynojoemods2764]

Yes can do an iron sleeve on most any cylinder and replated. Neither of which is a cheap process. As the sleeves for these all need to be custom made. The plating is the cheaper route for sure especially open cylinders

[@JMB676]

@@dynojoemods2764 thanks that’s great to know. The cylinder I’m thinkin of is a one piece jug, like most saw motors. Thanks for answering brother.

[@john.massing]

Are these big bore kits made to be bolted on using a base gasket on the cylinder?

[@dynojoemods2764]

They were machined to run with sealant only. But that also allows a thin gasket to be used if a case is ever a bit thinner than the rest.

[@jaspercooper7298]

How many ccs does the big bore make it?

[@dynojoemods2764]

Almost 98cc

[@richarddodds9326]

58×58×40×.7854=105.5 cc

[@HairlipButcher]

What about something for a ms362 Mtronic?

[@christopherlehman4045]

Might not be worth it since the 400 is based off the 362 and basically same weight with more power. I realize the 400 top end won’t bolt to a 362 but most guys I know that had a 362 just sold them and got a 400.

[@Super-Dave-Outdoors]

Who does the plating and will they plate single cylinders? Or is that a compamy secret?

[@dynojoemods2764]

Us chrome is doing the plating again. But running all the saw stuff through me currently. As I can prep the cylinders accordingly and do any final sizing etc before shipping back. Single cylinders are fine. Still trying to dial in a price. A lot more work to finish these blind cylinders correctly after a replate.

[@Super-Dave-Outdoors]

​@@dynojoemods2764ah, didnt really know there was more involved after a replate. Always contemplating something new i just never dove into actually trying to get one done. Great information to know!

[@Magoot2456]

​@dynojoemods2764 dude that is SO awesome they are doing blind plating through you! I guarantee that brings a ton of hope to all of us guys that like bringing the old monsters back to life, being most of these old saws you can't get cylinders for unless you want to pay insane ebay prices :) good job Joe!!!!

[@MotoLife541]

Are the wiesco pistons forged? If they are will there be an issue with cold siezing like mx bike motors? I know that warming up the engine is alot more important with a forged vs cast piston.

[@dynojoemods2764]

They are forged, should be ok in this application, but that will all be tested and such to see how they hold up.

[@MotoLife541]

@dynojoemods2764 I know that a forged piston will expand quite a bit more than cast, making it necessary to have more cylinder wall clearance. I've had a lot of 2 stroke motorcycles with forged pistons that will have a slight piston slap at cold start but will go away once warm. Just curious. Thanks for all the awesome content keep it coming bro.

[@Houseworksaws]

@@MotoLife541I’ve run a few forged Wiseco in work saws (372xpw & 346xp) When the piston is new letting the saw warm up for a minute is a good idea. I’m yet to have had any scoring issues.

[@MotoLife541]

@Houseworksaws thank you sir!

[@matthewknight5641]

I want the kit. Ill send money now. Tell me how to order this

[@matthewknight5641]

I just looked at the website to order the 661 kit. Will this fit on my farmer tech ms660? I assume it will but id hate to order the kit and it not work. Im fairly sure the 660 and 661 can interchange parts but id like to make sure ya know

[@dynojoemods2764]

661 is totally different design

[@matthewknight5641]

@@dynojoemods2764 dang man I was really hopeful in that it would work. Joe I have a 550xp mark2 and it rips. I'd like a 562 but I'd want it ported and maybe higher compression to make it a real super strong saw. Is there any chance of you doing that? I seen the website that advertised port work but is that for the complete build? I could send a new saw if needed but it might be easier just to have it delivered from the seller to your place rather than me ordering it and then sending it to you. I'm thinking the 562 ported would be the perfect saw for around the farm. It would be mostly a firewood saw but between my 550, ns872i, ms660 I'm still needing a saw that is capable but not super heavy ya know. I absolutely love my 550 but it's not quite big enough from time to time.

[@ethanadamson]

Sold out fast. 😢

[@apuuvah]

Best power-to-weight stock Stihl is 441, BTW.

[@Billy-burner]

How long until china makes these for $15...?

[@dynojoemods2764]

Hard telling. 661 has been out for a while now.

[@quentindavis6]

Hey, do you have any more left? I’d like to buy one for my 661

[@dynojoemods2764]

None left, I will be working on another batch. Probably do a presale on those next ones