Planet Minis

littlesweetboy · 07-06-2009, 10:21 PM

Hello, i have a 1980 z50r with a broken timing chain, everything else on the motor checks out good and want to repalce the chain. how do i get to the sproket in the motor end?? pics, parts brakedown or any other info would be great inculuding seting the timming

thanks
Kris

firepower354 · 07-06-2009, 10:44 PM

You need to remove the flywheel and stator plate, as well as the round cam cover and the bolt holding the idler wheel in the jug. I think you can do it without pulling the head.

arlindsay1992 · 07-07-2009, 08:04 AM

I managed to replace a stretched cam chain without pulling the head once. Lay the bike on the right side and you don't need to drain the oil. Just pull the flywheel and stator plate, then remove the cam sprocket cover. After that it's just a lot of fishing.

A video I made specifically about setting the cam timing.
YouTube - How To Set Cam Timing

littlesweetboy · 07-07-2009, 09:13 AM

is there a special puller needed to get the flywheel off?? can you do it with out it??

thanks
Kris

arlindsay1992 · 07-07-2009, 10:24 AM

Yes there is a special puller. It is possible to take it off without one but not worth your effort. Buy the tool.

flossy21 · 07-07-2009, 10:39 AM

Quote:

Originally Posted by littlesweetboy

is there a special puller needed to get the flywheel off?? can you do it with out it??

You CAN remove the flywheel without a puller but it basically requires you to beat the outside of the flywheel with a hammer repeatedly. There are two risks to this approach 1.) You could crack the flywheel or 2.) It is possible to demagnetize the inner rotor by striking it. If this happens then your flywheel is junk.

Here's the link to buy a tool that will remove your flywheel...

FLYWHEEL PULLER_CLICK TO_SEE APPLICATIONS most_50's_70's 75'S_80'S TRX90'S_ATC'S (8204)

littlesweetboy · 07-12-2009, 07:22 PM

thanks for the help, one more question, where is the best place to get a new timing chain or timing set??

thanks
Kris

arlindsay1992 · 07-12-2009, 07:25 PM

Here's where I buy my chains from.

Cam Chain 82LINK MOST ALL 50 AND 70 CC ENGINES (7F)

Here is how to set the timing.

YouTube - How To Set Cam Timing

mxracer41 · 07-12-2009, 07:58 PM

www.firepowerminis.com. 18.00 for a DID HD cam chain. best deal ever.

Quote:

Originally Posted by littlesweetboy

thanks for the help, one more question, where is the best place to get a new timing chain or timing set??

thanks
Kris

07-06-2009, 10:21 PM	#1 (permalink)
littlesweetboy PM Newbie Join Date: Jul 2009 Posts: 3	instaling a new timing chain Hello, i have a 1980 z50r with a broken timing chain, everything else on the motor checks out good and want to repalce the chain. how do i get to the sproket in the motor end?? pics, parts brakedown or any other info would be great inculuding seting the timming thanks Kris

07-06-2009, 10:44 PM	#2 (permalink)
firepower354 Advertiser Join Date: Oct 2006 Location: Flint MI Posts: 11,002 My Mood:	Re: instaling a new timing chain You need to remove the flywheel and stator plate, as well as the round cam cover and the bolt holding the idler wheel in the jug. I think you can do it without pulling the head. __________________ If it has my name on it I did it;) FirepowerMinis.com Custom FPM parts and engines. Parts and service for all makes. Honda Trail Bikes parts and accessories. Pitster/Piranha/Thumpstar bikes, parts, engines and accessories.

07-07-2009, 08:04 AM	#3 (permalink)
arlindsay1992 "High Speed Record Guy" Join Date: Mar 2006 Location: Northern Virginia Posts: 4,369	Re: instaling a new timing chain I managed to replace a stretched cam chain without pulling the head once. Lay the bike on the right side and you don't need to drain the oil. Just pull the flywheel and stator plate, then remove the cam sprocket cover. After that it's just a lot of fishing. A video I made specifically about setting the cam timing. YouTube - How To Set Cam Timing

07-07-2009, 09:13 AM	#4 (permalink)
littlesweetboy PM Newbie Join Date: Jul 2009 Posts: 3	Re: instaling a new timing chain is there a special puller needed to get the flywheel off?? can you do it with out it?? thanks Kris

07-07-2009, 10:24 AM	#5 (permalink)
arlindsay1992 "High Speed Record Guy" Join Date: Mar 2006 Location: Northern Virginia Posts: 4,369	Re: instaling a new timing chain Yes there is a special puller. It is possible to take it off without one but not worth your effort. Buy the tool.

07-12-2009, 07:22 PM	#7 (permalink)
littlesweetboy PM Newbie Join Date: Jul 2009 Posts: 3	Re: instaling a new timing chain thanks for the help, one more question, where is the best place to get a new timing chain or timing set?? thanks Kris

07-12-2009, 07:25 PM	#8 (permalink)
arlindsay1992 "High Speed Record Guy" Join Date: Mar 2006 Location: Northern Virginia Posts: 4,369	Re: instaling a new timing chain Here's where I buy my chains from. Cam Chain 82LINK MOST ALL 50 AND 70 CC ENGINES (7F) Here is how to set the timing. YouTube - How To Set Cam Timing

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