Motorized Bicycle Engine Kit Forum  

Sponsors



Go Back   Motorized Bicycle Engine Kit Forum > Bicycle Motor > 4 Stroke Bicycle Engines & Kits

4 Stroke Bicycle Engines & Kits 4 stroke motorized bicycle engine kits are great if you want reliability or do not want to mix your oil and gas. Learn from each other how to get the most out of your 4 stroke bicycle engine


Honda GX35 Bogging

4 stroke motorized bicycle engine kits are great if you want reliability or do not want to mix your oil and gas. Learn from each other how to get the most out of your 4 stroke bicycle engine


Reply
 
Thread Tools Display Modes
  #11  
Old 10-02-2011, 04:49 PM
cory151's Avatar
cory151 cory151 is offline
Motorized Bicycle Elite Member
 
Join Date: Oct 2010
Location: SoCal
Posts: 457
Thanks: 0
Thanked 1 Time in 1 Post
Default Re: Honda GX35 Bogging

Quote:
Originally Posted by happyvalley View Post
I can relate my experience with the same engine on the same drive set-up and say I've had excellent performance. Engine break-in I did was 10 hours, no WOT and varying rpms on a ride. I did a couple of oil changes in that time. Many users report a noticeable power increase after break-in and I agree with that, maybe as much as 20%. Though I infrequently run it wide open, maybe up a hill here and there, I have no issues with bogging, it will wind right through it's rpm range.
Many people assume 4 stroke dont benefit (in power) from break in and I thinks thats not really true, It seems to be bogging slightly less than it did yesterday. Im gonna keep beating it to see if thats gets it broke in.
Reply With Quote
  #12  
Old 10-02-2011, 04:50 PM
cory151's Avatar
cory151 cory151 is offline
Motorized Bicycle Elite Member
 
Join Date: Oct 2010
Location: SoCal
Posts: 457
Thanks: 0
Thanked 1 Time in 1 Post
Default Re: Honda GX35 Bogging

Quote:
Originally Posted by zean View Post
Hi cory 151. I'm still learning about engines. I would check the valve train for bent push rods or stuck valves and valve lash. I would check the carb if bad gas plugged up the tiny passages, first I would put 3oz of gumout 2x concentrated fuel cleaner in about a 1/4 tank of fuel more or less, two or three times,and see if that would restore power. Thankyou.
Fuel system cleaner did nothing and on the valve lash it checks out with a feeler gauge. The pushrods roll flat on a glass table.
Reply With Quote
  #13  
Old 10-02-2011, 07:06 PM
strotter strotter is offline
Motorized Bicycle Member
 
Join Date: Aug 2008
Posts: 48
Thanks: 0
Thanked 0 Times in 0 Posts
Default Re: Honda GX35 Bogging

No worries. I have built two Golden Eagle systems with GX35 engines. Both of them bogged at WOT until the motor was broken in. When you feel it bogging down, let up on the throttle. Keep doing that until the bogging stops. (only takes a few tanks of gas until it stops all together)
Reply With Quote
  #14  
Old 10-02-2011, 08:45 PM
cory151's Avatar
cory151 cory151 is offline
Motorized Bicycle Elite Member
 
Join Date: Oct 2010
Location: SoCal
Posts: 457
Thanks: 0
Thanked 1 Time in 1 Post
Default Re: Honda GX35 Bogging

Quote:
Originally Posted by strotter View Post
No worries. I have built two Golden Eagle systems with GX35 engines. Both of them bogged at WOT until the motor was broken in. When you feel it bogging down, let up on the throttle. Keep doing that until the bogging stops. (only takes a few tanks of gas until it stops all together)
Thanks Strotter, this is the info I was looking for. As evidence I have noticed this already happening. I feel like there is not a lot of information about these motors out there. Perhaps Ill start a new thread devoted to little things like this that I was unable to locate via Google.

Look for it.
Reply With Quote
  #15  
Old 03-26-2013, 01:01 PM
irishjedikev irishjedikev is offline
Motorized Bicycle Newbie
 
Join Date: Mar 2013
Location: NorCal
Posts: 9
Thanks: 0
Thanked 0 Times in 0 Posts
Default Re: Honda GX35 Bogging

Hey Cory151....curious if this fixed itself or not. I'm having the same problem!!
Reply With Quote
  #16  
Old 03-30-2013, 05:24 PM
andrewflores17's Avatar
andrewflores17 andrewflores17 is offline
Motorized Bicycle Elite Member
 
Join Date: Jul 2010
Location: colorado springs, CO
Posts: 477
Thanks: 5
Thanked 10 Times in 9 Posts
Default Re: Honda GX35 Bogging

Mine came in the mail yesterday looks like a very well built little engine ill let you know if i have the same troubles here on the road .

anyone seen a upgraded car that may work on these things ?
__________________
Great bikes are built not Bought

http://motorbicycling.com/showthread.php?t=34006 Link to INFIDEL 99cc predator build
http://motorbicycling.com/showthread.php?t=39541Link to Recumbent golden eagle build
Reply With Quote
  #17  
Old 05-22-2013, 09:08 PM
alexkram alexkram is offline
Motorized Bicycle Newbie
 
Join Date: May 2013
Location: Reno, NV
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
Default Re: Honda GX35 Bogging

I realize I'm posting on a 2 year old thread but I fixed my Honda GX bog at WOT issue and I want to share how I did it for others with this problem. The bog was due to a lean condition. You can verify this by removing the air filter cover. Does it get worse? If it does it's too lean.

I took apart the carburetor and there is a pump in there with a diaphragm which presses onto a small steel lever. I bent the lever up just slightly so the diaphragm uses more of it's stroke. Bam, now it has MUCH better low RPM throttle response and no bog at WOT.
Reply With Quote
  #18  
Old 07-27-2013, 11:28 AM
sailorhuete sailorhuete is offline
Motorized Bicycle Newbie
 
Join Date: Oct 2011
Location: Jacksonville
Posts: 13
Thanks: 0
Thanked 0 Times in 0 Posts
Default Re: Honda GX35 Bogging

With 250 hours on my honda it is now bogging all over the place. Full/part/mid it doesn't matter. I made sure cam timing is correct. I have a brand new air filter, spark plug and fresh fuel. I verified correct gap on the valves, the ignition coil and the pump in the carb. The spark plug does not look like i have been running a lean mixture. The oil is changed every 4 hours of riding. The exhaust valve has a lot of deposits on the stem and spring of valve inside of the head. Has anyone put any larger jets in the carb to solve the problem. I went from running at 8500 rpm to 6500 rpm in like 10 hours. Does this sound like a leaky exhaust or intake valve?
Reply With Quote
  #19  
Old 07-28-2013, 06:38 PM
GearNut's Avatar
GearNut GearNut is offline
Motorized Bicycle Elite Member
 
Join Date: Aug 2009
Location: San Diego, Kaliforgnia
Posts: 5,031
Thanks: 83
Thanked 137 Times in 126 Posts
Default Re: Honda GX35 Bogging

Quote:
Originally Posted by sailorhuete View Post
With 250 hours on my honda it is now bogging all over the place. Full/part/mid it doesn't matter. I made sure cam timing is correct. I have a brand new air filter, spark plug and fresh fuel. I verified correct gap on the valves, the ignition coil and the pump in the carb. The spark plug does not look like i have been running a lean mixture. The oil is changed every 4 hours of riding. The exhaust valve has a lot of deposits on the stem and spring of valve inside of the head. Has anyone put any larger jets in the carb to solve the problem. I went from running at 8500 rpm to 6500 rpm in like 10 hours. Does this sound like a leaky exhaust or intake valve?
It sounds like the exhaust valve guide is leaking oil down onto the valve.
Is there alot of black, oily, scaly buildup inside the exhaust port too?
__________________
The_Aleman:
"It's a chinagirl. It's a sometimes fun little engine that often will break your heart. It's disposable.

Does not come with a fortune cookie."
________________________
ROTFLMAO!!!!!!
Reply With Quote
  #20  
Old 07-28-2013, 07:17 PM
Otero's Avatar
Otero Otero is offline
Motorized Bicycle Elite Member
 
Join Date: Feb 2010
Location: wa
Posts: 531
Thanks: 4
Thanked 20 Times in 19 Posts
Default Re: Honda GX35 Bogging

I experienced a similar problem with my GX35 after break-in. If in mounting
your Honda it got tilted far enuf for oil from the oil breather tube to saturate
the air filter the engine will run but suffocate at WOT. Also bad gas will clog
your gas filter even after it has evaporated out of the air filter. Clean your
air filter, dry it, and then check your fuel filter. If the fuel filter is brown,
chances are not enuf gas gets to the carb bogging it out. Replace filter.
Least ways, doing the above solved my problem.

Just an FYI, better late than never.

Last edited by Otero; 07-28-2013 at 11:19 PM.
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 08:06 AM.


Sponsors

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
MotorBicycling.com