No engage no roll

AaronF · #1 03-19-2010, 08:57 PM

Hello,after walking 2+ miles through the "hood" of town I thought I'd see if I could get any help here before I go mess with the motor.I'm running a stock 66cc with a centrifugal clutch (automatic) and pull start.I was just riding down the street at 25+ mph then all I hear is VROOOOOOOOOM as if the bike is running full idle.I got off checked my clutch cable still good,messed with the clutch arm nothing,my bike rolls freely with the clutch engaged and disengaged..My motor starts right up with no problems,no noise but it won't scoot along.So I'm thinking it has something to do with the centrifugal? What should I check/do? Thank you.

corgi1 · #2 03-19-2010, 09:50 PM

Did u look in the clutch cover yet? ,,,,,,'' FIRST'' check if the centrivical clutch is bolted on ,so it dosnt fly off'',,,,,,,,if so ,start the engine and see what turns w/the engine

AaronF · #3 03-19-2010, 10:00 PM

Quote:

Originally Posted by corgi1

Did u look in the clutch cover yet? ,,,,,,'' FIRST'' check if the centrivical clutch is bolted on ,so it dosnt fly off'',,,,,,,,if so ,start the engine and see what turns w/the engine

Took the clutch cover off gear spins freely both ways.I took the CC cover off the centrifugal is bolted on and it spins with finger force both ways.Clutch pulled or not pulled,my bike still moves freely.Seems as something is not "catching" maybe the clutch pads? Flower nut? I have no clue.

mapbike · #4 03-19-2010, 10:23 PM

Sheared Key maybe? just a thought..

corgi1 · #5 03-19-2010, 10:33 PM

from the back wheel When u roll the bike ,the chain turns the clutch shaft on the right,that shaft goes through too the main clutch on the left ,,the gear teeth on the main clutch mesh with the teeth on the centrivical clutch drum toward the front of the bike(motor),,,the clutch shoes (pie shaped things) turn when the engine is running,,,,"start" the engine and see if they are turning ,,"and",,," do they grip the clutch drum when u speed up the engine???

corgi1 · #6 03-19-2010, 10:42 PM

The words,,,,spins freely by finger clutch pulled or not pulled ,,I read over that again and I would check the flower nut and clutch pads ,,,Also check the sproket at the clutch arm for loose

AaronF · #7 03-19-2010, 10:48 PM

I made a short video of the centrifugal with the motor running.There is a loud rattling sound now coming from the motor.

MVC-001V.flv video by m_a818 - Photobucket

corgi1 · #8 03-19-2010, 11:02 PM

The clutch looked like it was turning ,,,I think the next step will be to remove the clutch and check in the flower nut area under the next cover

AaronF · #9 03-20-2010, 12:05 AM

Quote:

Originally Posted by corgi1

The clutch looked like it was turning ,,,I think the next step will be to remove the clutch and check in the flower nut area under the next cover

Yes the clutch pads are slipping.Thank you for your kind help Corgi.This is going to be a little off topic here sorry.I really don't have the time,money or tools to mess with the motor,I've invested way to much money into trying to get a decent built MB but have failed.I just bought the engine for $150 two months ago lol!I hate to say it here but I'm done with these china motors as much as I enjoy the hobby,I just can't afford no more.I'm gonna offer and let go of the two motors I have witch are both black 66cc's the other one needs a new piston.If someone wants these you can have both motors/intakes for $75+shipping?

I appreciate your help Corgi thanks man.

corgi1 · #10 03-20-2010, 12:44 AM

You could probibly use the clurch parts from the bad piston motor to fix this one lots of times they are the same