Two Stroke Motocross

Two Stroke Motocross Forum => Technical => Topic started by: mxracer239 on December 08, 2012, 06:38:21 PM

Title: 02 yz 85 clutch prob
Post by: mxracer239 on December 08, 2012, 06:38:21 PM

My son has a yz 85 i just put new handlebars on an he took it out for a few laps, the bike ran great he stopped for a few mins got back on an started it up put it in gear an it just revs but doesnt go anywhere

any ideas?

Title: 02 yz 85 clutch prob
Post by: cnrcpla on December 08, 2012, 07:51:00 PM

Clutch is not engaging, check the cable for snapping, and adjust it so that 1/8 of the clutch pull doesn't move the cable.

Title: 02 yz 85 clutch prob
Post by: mxracer239 on December 08, 2012, 08:35:59 PM

what do you mean by snapping? The cable seems to be working fine has play before pressure is felt when pulling in

Title: 02 yz 85 clutch prob
Post by: cnrcpla on December 08, 2012, 08:40:43 PM

I meant if the cable snapped it wouldn't be pulling the clutch out. But seeing as that's all set, check the clutch springs would be the next step. What happens when you put the bike in gear and try rolling it with the clutch engaged and disengaged?

Title: 02 yz 85 clutch prob
Post by: mxracer239 on December 08, 2012, 11:28:15 PM

yeah i tried that the bike just revs an wont move, goes into gear fine

Title: 02 yz 85 clutch prob
Post by: cnrcpla on December 08, 2012, 11:30:23 PM

If the engine isn't running, and you put the bike in gear with the clutch out, does it roll freely, or does it lock up the tire?

Title: 02 yz 85 clutch prob
Post by: mxracer239 on December 08, 2012, 11:41:31 PM

it turns the motor over if you roll it gear

Title: 02 yz 85 clutch prob
Post by: cnrcpla on December 08, 2012, 11:45:45 PM

That's odd. Well if the cable is good you should probably take the clutch cover off and take a look at the clutch. Pull the lever then release it and if they don't move inward (compressing themselves) than you have an issue.

Title: 02 yz 85 clutch prob
Post by: mxracer239 on December 08, 2012, 11:51:44 PM

yeah i took the the clutch out, even the basket put every thing back together seems when i pull the lever the plates dont move just pushes the pressure plate out

Title: 02 yz 85 clutch prob
Post by: cnrcpla on December 08, 2012, 11:54:51 PM

I would say take them out and clean them all... It sounds sucky and time consuming, and it is. I had to do it to my 250 once, but for the opposite problem. Oh and while you have it out, check the plates and make sure they are in spec and not worn out. What kind of fluid do you run in it?

After cleaning them soak them in trans fluid for a while before reinstalling. Hope this works for you, good luck 

Title: 02 yz 85 clutch prob
Post by: mxracer239 on December 08, 2012, 11:56:40 PM

thanks for the info

Title: 02 yz 85 clutch prob
Post by: cnrcpla on December 09, 2012, 12:09:24 AM

No problem. I would consider changing the fluid to another brand to be honest.

Title: 02 yz 85 clutch prob
Post by: mxracer239 on December 12, 2012, 09:16:40 PM

update, i ordered a copmplete clutch kit from rocky mountain atv (tusk) that fixed the prob!!

Title: 02 yz 85 clutch prob
Post by: cnrcpla on December 13, 2012, 02:21:35 AM

Plates were shot?

Title: 02 yz 85 clutch prob
Post by: mxracer239 on December 13, 2012, 01:55:38 PM

yep