Motorized Bicycle Engine Kit Forum  

Sponsors



Go Back   Motorized Bicycle Engine Kit Forum > Motorized Bicycle Mechanical Components > Heads and Cylinders

Heads and Cylinders All about your porting, compression, rings, cylinder and piston modifications to your bicycles engine

Reply
 
Thread Tools Display Modes
  #11  
Old 08-11-2016, 04:58 AM
codyj528 codyj528 is offline
Motorized Bicycle Newbie
 
Join Date: Aug 2016
Location: TEXAS
Posts: 3
Default Re: Slowing Top Speed

Quote:
Originally Posted by maniac57 View Post
Using so much oil basically triples (or more!) break-in time due to rings being overlubricated and unable to properly seal to cylinder wall.
Break-in means rings seating and too much oil can easily prevent it EVER happening.
Poor compression, poor manners and reduced power are usual results of too much oil.
I'd bet $50 your jug was basically new inside regardless of prior use, so it ran like a new top end: poorly.
Meh. I couldn't remember the spec sheet but it was more like 20 or 25. Whatever the Chinese called for. And it had about 3 tanks of fuel ran thru it so I'd consider it a ok broken in. Besides. This isn't a gt500 break in.... but you know we drove that thing like a stolen car the first 5 miles off the lot on a 4 hour road trip home. Let's just say my Datsun couldn't keep up.
Reply With Quote
  #12  
Old 08-11-2016, 05:00 AM
codyj528 codyj528 is offline
Motorized Bicycle Newbie
 
Join Date: Aug 2016
Location: TEXAS
Posts: 3
Default Re: Slowing Top Speed

66cc motor bicycle https://imgur.com/gallery/8Rc4U
Reply With Quote
  #13  
Old 08-11-2016, 09:20 AM
Kioshk's Avatar
Kioshk Kioshk is offline
Motorized Bicycle Elite Member
 
Join Date: Oct 2012
Location: Connecticut
Posts: 1,136
Default Re: Slowing Top Speed

Quote:
Originally Posted by StevenMain View Post
...fuel sloshing from the slight vibration, or maybe the bowl is running dry due to a filter restriction idk. Any thoughts ?
BINGO.

I've had the same "problem", but I think it's a good thing. It's either that the carb-bowl's fuel is aerated from sloshing (doubtful), or there's not enough fuel getting in at high-revs (probable). Hold down the tickler with your left-hand when it starts happening again and report your findings. Better yet...for safety purposes...bring along a small child for the ride and have them do it.
Reply With Quote
  #14  
Old 08-11-2016, 02:20 PM
StevenMain StevenMain is offline
Motorized Bicycle Elite Member
 
Join Date: Jul 2016
Location: Texas
Posts: 108
Default Re: Slowing Top Speed

Hold down the tickler ? What? Lol
Reply With Quote
  #15  
Old 08-11-2016, 04:16 PM
Kioshk's Avatar
Kioshk Kioshk is offline
Motorized Bicycle Elite Member
 
Join Date: Oct 2012
Location: Connecticut
Posts: 1,136
Default Re: Slowing Top Speed

The goldy thing!

Reply With Quote
  #16  
Old 08-11-2016, 05:12 PM
StevenMain StevenMain is offline
Motorized Bicycle Elite Member
 
Join Date: Jul 2016
Location: Texas
Posts: 108
Default Re: Slowing Top Speed

I have a keihin 20mm there is no primer.
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 03:36 PM.


Sponsors

Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
MotorBicycling.com