Motorized Bicycle Engine Kit Forum  


Go Back   Motorized Bicycle Engine Kit Forum > Motorized Bicycle > Motorized Bicycle General Discussion

Motorized Bicycle General Discussion All topics regarding bicycles with engines.

Thread Tools Display Modes
Old 04-10-2014, 11:30 AM
Nashville Kat's Avatar
Nashville Kat Nashville Kat is offline
Motorized Bicycle Elite Member
Join Date: Apr 2009
Location: Jacksonville, Florida
Posts: 1,403
Default Re: Resistance while clutch is pulled

415 Industrial/Trike chain- here it is:

the best thing you can do to get a better pedal, whether there's another problem or not-

440 grams

compared to 800 grams weight of KMC standard 415 chain

If you're thinking about running a smaller 410 chain-
the Trike chain is about the same weight and rolling resistence
but with more margin of error
and fits on standard kit sprockets

Last edited by Nashville Kat; 04-10-2014 at 11:37 AM.
Reply With Quote
Old 04-10-2014, 07:21 PM
mapbike's Avatar
mapbike mapbike is offline
Motorized Bicycle Elite Member
Join Date: Mar 2010
Location: Central Texas
Posts: 5,379
Default Re: Resistance while clutch is pulled

Thats a good price on that chain NashKat, I like that its lighter weight as long as it will hold up good, I run KMC chain on all my bikes and it has always gave me great service.
I didnt catch how many links it is per chain but I assume its like most 98Links
I dont always ride WOT, but when I do..I do my best to keep the rubber side down..Ride safely my friends!
Reply With Quote
Old 04-10-2014, 08:57 PM
maniac57's Avatar
maniac57 maniac57 is offline
Old, Fat, and still faster than you
Join Date: Oct 2011
Location: memphis Tn
Posts: 4,486
Default Re: Resistance while clutch is pulled

Originally Posted by Longhaulin View Post
I have a couple bikes both with grubee 66cc 2 stroke motors, one rolls fine and the other has this problem you describe with the drag/friction when clutch lever is pulled in. Said motor has 3000 miles, a while ago I opened the left side where the bar and bearing are; well the bearing was smashed/crushed to 2/3 or 3/4 its original width... I found a slightly longer bar than the one that was in there and this alleviated the problem of drag. I didn't have a replacement bearing so that crushed one is still in there, it may come out with a thin magnet but I haven't a magnet to fit in there. I know they have them at harbor freight but funds are tight even for a $2.59 magnet as such for my tool bag! The bike has drag when clutch handle is pulled in and the button is pushed down to hold it in place, however if it is pulled in tight up against the handle, holding it by hand which gets tiring, it rolls easy Instead of holding it by hand one could wrap a small rope around it a few times... The other bike does not have this issue.

i've also had to adjust the cable numerous times because I found that pedaling with the drag and not having the clutch lever pulled tight against the handlebar, made the cable loosen up and drag was there even with clutch lever pulled all the way in. I replaced the cable to the same effect but the bike is better than the last few months now that I know to hold it in tight when I want to pedal. Running with original clutch pads.
I'd get that bearing out of the clutch shaft while you still have a chance. If it gets mashed badly enough, you will never get it out without splitting the case and dis-assembling the entire shaft IF it will come out.
If it's held by grease, the best way to retrieve it is to rinse the hole with some solvent to cut the grease and lay it over so gravity and a few sharp raps on the opposite end of the shaft can work it free.
I usually use lighter fluid for this. Might need several rinsings and a brush or something to swish the grease free.
Once that ball gets squashed enough, it will jam in the hole (if it's not already)
Replacing the bar to take up wear is truly not a good way to handle this issue.
If more is better, then too much is just enough.
If you can't afford it, build it yourself.
Reply With Quote

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 12:17 AM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2016, vBulletin Solutions, Inc.