Motorized Bicycle: Engine Kit Forum  

Sponsors



Go Back   Motorized Bicycle: Engine Kit Forum > Bicycle Motor > 2 Stroke Bicycle Engines & Kits

2 Stroke Bicycle Engines & Kits 2 stroke motorized bicycle engine kits need careful installation and setup, find out how from our professionals here!

Reply
 
Thread Tools Display Modes
  #1  
Old 01-29-2009, 10:48 PM
mikevanky mikevanky is offline
Motorized Bicycle Newbie
 
Join Date: Jan 2009
Location: northcarolina
Posts: 7
Default clutch noise. slipping? Help!

I just got all the bugs worked out on my new ride ( or so i thought) . ie. crank sprocket falling off, rear sprocket miss-aligned, fixing then replacing throttle cable, replacing fuel line, re-welding gas tank, adjusting rear wheel bearings, replacing muffler gasket, replacing head gasket, spark plug broke and was replaced, problem with carb on intake seal, kill switch broke, and making a mount plate from scratch because the included one was not included. oh and don't for get stripping and replacing hardware. haha, was running great until....

my problem now is it sounds like the clutch is slipping or some thing is making a rather high pitched noise. dose not happen when clutch is disengaged.
It also seems real bogged down on the top end???
Any help would be greatly appreciated.
Reply With Quote
Sponsored Links
  #2  
Old 01-30-2009, 12:19 AM
robin's Avatar
robin robin is offline
Motorized Bicycle Elite Member
 
Join Date: Nov 2008
Location: Penticton British Columbia Canada
Posts: 567
Default Re: clutch noise. slipping? Help!

.
I had problems --found out i was pulling clutch too far in--readjusted it --now only pulls in half inch or less--it works perfect--dont know top end
Reply With Quote
  #3  
Old 01-30-2009, 07:36 AM
Creative Engineering Creative Engineering is offline
Banned
 
Join Date: Sep 2008
Location: Clearwater, FL
Posts: 1,727
Default Re: clutch noise. slipping? Help!

Quote:
Originally Posted by mikevanky View Post
I just got all the bugs worked out on my new ride ( or so i thought) . ie. crank sprocket falling off, rear sprocket miss-aligned, fixing then replacing throttle cable, replacing fuel line, re-welding gas tank, adjusting rear wheel bearings, replacing muffler gasket, replacing head gasket, spark plug broke and was replaced, problem with carb on intake seal, kill switch broke, and making a mount plate from scratch because the included one was not included. oh and don't for get stripping and replacing hardware. haha, was running great until....

my problem now is it sounds like the clutch is slipping or some thing is making a rather high pitched noise. dose not happen when clutch is disengaged.
It also seems real bogged down on the top end???
Any help would be greatly appreciated.
Hey, welcome to the forum...one way or another the help you need is here.

Jeez, I hope you made out better in that crash than your bike did .

Seriously...describe exactly what the clutch is doing.

If you are sure it's slipping, you need to remove the cover and adjust the star nut, clockwise. There is a small philips screw that locks the star nut in place. Remove it, and disengage the clutch by rotating the arm that the clutch cable is attached too. Now you will be able to turn the star nut clockwise. Adjust the star nut, (clockwise), until there is just a bit of free play in the pressure plate. In other words, you should still be able to push the bike without excessive drag. If your clutch was slipping due to this adjustment, the star nut should have turned at least one turn.

If it still slips after this adjustment, you may have glazed the friction pads.

It is also possible that the primary spring is out of adjustment, but first things first.

Keep posting info, and we'll help get it fixed.

Jim
Reply With Quote
  #4  
Old 01-30-2009, 07:41 AM
Creative Engineering Creative Engineering is offline
Banned
 
Join Date: Sep 2008
Location: Clearwater, FL
Posts: 1,727
Default Re: clutch noise. slipping? Help!

Mike,

I forgot to mention:

While the clutch cover is off, check and make sure that the large flat-head screw on the crank gear is tight. Sometimes this screw will back out and rub the inside of the cover...Noise. If it is loose remove it completely and locktite it.

Jim
Reply With Quote
  #5  
Old 01-30-2009, 07:50 AM
Creative Engineering Creative Engineering is offline
Banned
 
Join Date: Sep 2008
Location: Clearwater, FL
Posts: 1,727
Default Re: clutch noise. slipping? Help!

Also,

The gear with the friction pucks floats on the countershaft hub. There is a considerable amount of axial, and lateral play in this gear when the clutch is disengaged. If the clutch doesn't lock tight, the gear may be fluttering causing the noise.

Jim
Reply With Quote
  #6  
Old 01-30-2009, 10:14 AM
Ghost0's Avatar
Ghost0 Ghost0 is offline
Motorized Bicycle Elite Member
 
Join Date: Mar 2008
Location: Bellingham, WA
Posts: 741
Default Re: clutch noise. slipping? Help!

It is also a good idea to put a small amount of grease on the teeth of the clutch gears.
__________________
Design is easy, execution the hard part.
www.sickbikeparts.com
Reply With Quote
  #7  
Old 01-30-2009, 07:34 PM
mikevanky mikevanky is offline
Motorized Bicycle Newbie
 
Join Date: Jan 2009
Location: northcarolina
Posts: 7
Default Re: clutch noise. slipping? Help!

I don't believe that it is the screw on the crank sprocket because it only happens when the motor is powering the bike( and that it has rattled off once). when in idle the noise stops. The chain inst rubbing on any thing. also I don't think it is some thing in the clutch vibrating because it only happens when engaged.

I will try adjusting the flower nut tomorrow, cause tonight I party!
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -5. The time now is 11:33 AM.


Sponsors

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2012, vBulletin Solutions, Inc.
Motorized Bicycle Engine Kit Forum