Z155 pit bike engine timing. Fitting the cam chain and head.

The next video on our ZS155 pitbike engine. i put the head on and set the timing.

[@deanandrew-gr1ch]

I had an 80cc bottom end and a 125 barrel, I cut the the metal sleave that goes into the bottom and then filed the piston down afew thousands of a mm. I didn't know that by taking the top of the piston down to just above the top ring it created a small bit which allowed a bit of extra fuel which when it all went back together it made the bike keep up with 140s as there's not much between a good 125 and 140. It turned the semi bottom end could get alot more out of it and was stunned when it took over my m8s 140cc crf110.

[@gazking08mx]

Well done getting to 1k subs. Videos really do help. Anyone working on bikes will appreciate all your content. Top guy

[@motorcyclefixer]

Thank you very much 👍🏼

[@LJ-ou2gl]

Currently rebuilding my m2r 160 bottom to top. Like u said it is relaxing to some watching people fix bikes so i decided to get my own project love the vids mate 👍🇬🇧

[@motorcyclefixer]

thank you. all the best with your build

[@LJ-ou2gl]

@@motorcyclefixer Do you know where i could possibly find the washer/spacers which you use for the idle gear, kickstart gear and clutch and crank gear? Almost finished the bottom end but havent got the spacer/washers needed… also thanks for the reply!

[@LJ-ou2gl]

The washers you can see in your other video where you assemble the clutch side of the engine i mean..

[@motorcyclefixer]

@@LJ-ou2glThe best place for these small bits are to get them off a wrecked engine as they don't sell them separately

[@LJ-ou2gl]

@@motorcyclefixer thanks for the help!

[@joshwesley8787]

Love your channel

[@motorcyclefixer]

Thank you very much 👍🏼

[@connorjack3246]

Got a new head to fit tomorrow so your video is very handy and easy to understand. Top work

[@motorcyclefixer]

Thank you 👍🏼

[@connorjack3246]

@@motorcyclefixer what are you setting the valves at too mate?

[@motorcyclefixer]

@@connorjack3246 have a look at the next video. It's on that one 👍🏼

[@connorjack3246]

@@motorcyclefixer I’m literally down the shed now mate got all the parts laid out, just putting the rings on high dome piston. I know whic order they go in not sure which way the writing on the rings face. I’m sure the face inward and not outwards? Awesome man love it

[@motorcyclefixer]

@@connorjack3246 writing towards the top of thecpiston

[@liambradley117]

your very helpful with the videos an very helpful when you had the bike shop open

[@motorcyclefixer]

Thank you Liam Appreciate it 👍🏼

[@core-vb6cb]

Thanks for the vid mate

[@motorcyclefixer]

No problem 👍🏼 I hope it helped

[@deanandrew-gr1ch]

Hi m8 so happy that you to your target with your subscribers" I'm not just saying this but this man is salt of the earth and is a wizard when it comes to all types of motorbikes and the detail he goes into with whatever he's fixing. I took my z155 engine up to his old shop and how he managed to find a hairline crack on one of the gear cogs which was stopping the coggs messing together. I just wondering if you have a number I can get hold of you on as I did email your account but don't know if you got it as I didn't receive a reply.

[@motorcyclefixer]

Hi Dean I didn't see an email sorry Drop me an email to [e-mail]

[@sophianapier4002]

Hey i just brought a z155 What do you set the valve clearances to? And how many turns out on the fuel strew?

[@motorcyclefixer]

1 and a quarter turns out on the fuel screw to start I cant remember the valve clearances off the top of my head sorry. They'll come up on google though

[@blownwest1117]

You're very welcome and keep them coming, if im right the timing marks are on the sprocket? I use the spring-loaded bolt to tension the slidders. But very detailed video as always. With my 1 of my z155s, I think it's the stopper arm bottom pin has become lose enough to jump up onto the shifter drum but keel thinking it was the gearbox or another hairline crack in the linkage cogs like the one you found on my engine when I brought it up to you to which I was so grateful and appreciate it. Many thanks again

[@motorcyclefixer]

Thank you Dean If you've still got an issue with it, bring it up and we'll get it sorted

[@blownwest1117]

@@motorcyclefixer your welcome and a big congratulations on the 1000 subscribers as your videos are so detailed and good you deserve many more so guys who watch any of this motorcycle Gods videos any true person who loves to learn how to do something there's no better teacher in my book.

[@blownwest1117]

@@motorcyclefixer yea I wouldn't mind that if your able to fit me in in about 3 weeks time if that's ok with you. I put it all back together and it runs but I just ain't got any clutch. It goes through the gears fine one second and then the next its not as smooth as it should be. Plus the no clutch problem, I thought that they might have needed the engine to run to pressure the clutch as they wet clutches on the 155 but even after leaving the bike run still clutch get no clutch, I have a spare one here but when I put it on it locked the engine up. It's whole at the moment so if I strip it back down and you could fit me in in about 3 weeks time id be really grateful and very much appreciate it. Sorry, I must have missed this message until just now. Thanks, budd

[@motorcyclefixer]

@@blownwest1117 no problems Let me know when you're coming and I'll give you the address

[@motorcyclefixer]

@@blownwest1117 also best to leave it together really as it may be easier to see what's wrong

[@Chozenfew73]

So the 2 lines on the cam gear can go either way around as long as the T on the flywheel lines up with each one. is that correct ?

[@motorcyclefixer]

off the top of my head yes make sure the piston is at tdc with a rounded object and check which mark on the flywheel lines up so your 100% Then check the cam sprocket lines up with the arrow on the head when the valves are closed. that's when the cams are not pressing on the valves I hope this helps

[@LJ-ou2gl]

@@motorcyclefixershould the valve rockers be free to move when setting timing?

[@motorcyclefixer]

@@LJ-ou2gl yes there should be a little bit of play in them

[@user-yw5jd7by9g]

Hi mate, see when I rev when start bike there is a bad firecracker popping sound, seems to be in lower revs and calms down slightly , is this what has happened ?

[@user-yw5jd7by9g]

Just replaced whole head aswell; it’s a horrible noise and only when first rev

[@motorcyclefixer]

Hi I would take it apart again and check it if it were mine tbh👍

[@connorjack3246]

Hi mate I’m replacing bottom and head gasket on Z3R 140, I got a O ring for the bottom end I’m wondering if there’s suppose to be one for the head gasket too??

[@motorcyclefixer]

Was there one on there when you took it off

[@connorjack3246]

@@motorcyclefixer to be honest I don’t have a clue, there’s enough of the head showing inside the gasket for a O ring.

[@connorjack3246]

@@motorcyclefixer I just had a read online in a forum and apparently there isn’t meant to be one there even though the recess in the gasket is large enough for one.

[@connorjack3246]

@@motorcyclefixer I just had a read online in a forum and apparently there isn’t meant to be one there even though the recess in the gasket is large enough for one.

[@connorjack3246]

@@motorcyclefixer my dilemma is I got an O ring on worktop that fits in there, this is where I’m confused lol

[@E34turbo2.5]

mine 155zs engine why the cam chain does not tighten The cam chain tensioner is tightened

[@motorcyclefixer]

It could be that the cam chain has stretched or the cam chain tensioner is not working correctly

[@Alexii]

Gonna be doing my Stomp's first ring replacement it's never been replaced anything else I should be thinking about replacing? Its a 2018 160

[@motorcyclefixer]

Hi It's best to change the complete piston kit New gaskets and adjust the valve clearances 👍🏼

[@Alexii]

@@motorcyclefixer cheers for the quick reply new problem also came up. I’m getting this tapping noise whenever I put it into first gear. Every time the bikes goes it starts tapping no matter if the bike is on or off. This tapping only happens when moving and only in first gear

[@motorcyclefixer]

@@Alexii you may have a broken tooth on one of the first gears if its only in first it's making the noise

[@Alexii]

@@motorcyclefixer is it something to get changed as fast as possible or

[@motorcyclefixer]

@@Alexii it's a full engine tear down and replace the gearbox so i suppose it's up to you really depending on your skills and the cost etc. Seeing as you'll be taking the barrel off there's no harm in taking the clutch cover off and having a look

[@connorjack3246]

Hi mate still doing the rebuild on the yx160 pitbike. I put in the cam chain tensioner and followed everything you done and my chain still seem to have abit of slack in it, is this normal? Cheers mate

[@motorcyclefixer]

A little bit of slack is ok

[@connorjack3246]

@@motorcyclefixer ok mate cheers for reply, can chain tensioner is rounded off only just noticed it. I think that may be the reason the valves smashed into the piston because the timing chain had slipped off of the crank.

[@connorjack3246]

@@motorcyclefixer all back together and snapped oil feed bolt I’m absolutely fuming any idea where I can get one please it’s got the hole through the middle 😣

[@motorcyclefixer]

@@connorjack3246 I bought them from ebay 👍🏼

[@motorcyclefixer]

@@connorjack3246 2 x 8mm Pit Bike Oil Cooler, Brake or Engine Banjo Bolts These are the ones

[@andymccune3951]

When you where checking, what's the reason for putting the ball end of allem key in the back? Great videos mate 👌

[@motorcyclefixer]

Just to make sure it's at tdc

[@andymccune3951]

@@motorcyclefixer thanks for the reply, tdc?

[@motorcyclefixer]

@@andymccune3951 top dead centre

[@andymccune3951]

Got ya, thanks m8. I'm gonna strip mine tomaro n fit new head gasket. Your videos have helped me alot, thanks

[@andymccune3951]

What it's best thing to use to take bits of the old gasket still left on?

[@gvn-xk6eq]

Hi mate after doing a oil change on my pitbike it seems to be smoking pretty badly it has the correct amount of oil in but seems to be really smokey I rode it for about half hour to see if it would just burn off but it's still smoking any ideas why maybe piston rings ?

[@motorcyclefixer]

It could be piston rings. That's all you did is change the oil?? Was there oil in there before

[@gvn-xk6eq]

@@motorcyclefixer yeah mate that's all I did was change the oil and I bought the bike recently rode it for a few days then checked the oil it had no oil on the dip stick so I removed the oil about 100ml dropped out 😬 no where near the amount it should have in the oil had no metal shavings as I put a magnet in to check and nothing so I don't think it's done much damage.

[@motorcyclefixer]

@@gvn-xk6eq Could be the rings or the valve stem seals Probably burnt all the oil away that's why it wasn't smoking and no oil in it 🤦‍♂️

[@gvn-xk6eq]

@@motorcyclefixer I wish people would just be honest when they sell something are the stem seals easy to replace ? I'm very aware how to do piston and ring replacement also why I was thinking piston rings is it doesn't have a lot of compression when kicking it but it starts first or second kick from cold.

[@motorcyclefixer]

@@gvn-xk6eq The stem seals are easy enough you just need a valve spring compressor to get the collets off. I know what you mean I just bought a bike off ebay and the guy didn't mention the frame was damaged where the footpeg bolts on 🤦‍♂️

[@x7fire]

Gracias por su contenido. Es posible la tabla de par de aprientes compartir. un saludo

[@motorcyclefixer]

Intake valve clearance 0.1mm Exhaust valve clearance 0.15mm