TRX rich mixture and misfiring at low revs

96 Yamaha TRX 850 discussion forum:


TRX rich mixture and misfiring at low revs

TRX rich mixture and misfiring at low revs 
Bodgley said 2008-06-07 21:15 
 
Hi, I am new to this kind of thing but I am struggling. I have owned over 200 bikes, mostly old nails and I have a mechanical and electrical background. However, my TRX has me stumped. Both cylinders are running rich to such an extent that the bike is very lumpy to ride at low revs. I have changed the air filter, replaced the plugs, checked that the choke is not sticking, replaced the complete choke assemblies, cleaned the carbs several times, checked the diapragms that enrich the mixture on the over run, rplaced the o rings that seal the main jets and I even did the valve clearances to give me some time to ponder on the problem.
I do not think that it is electrical and a misfire is causing the plugs to foul as it clears for a few miles when new plugs are fitted and the problem disappears as the revs rise. The bike ran perfectly if a little rich for 10,000 miles before this. I suspect that the bike has been dynojetted.
I really like the bike but I am running out of ideas, can anyone suggest something that I may have over looked?
Regards Mark. 
 
<<Previous          Answer          Discussion overview          Report spam          Next>>

Comments, questions and answersEnter a comment or answer to this message

You can post your question, answer or comment as a guest. Or enter your e-mail to join the forum and get notifcations of new messages.

 
Title 		 
Signature
Optional e-mail
Enter your e-mail to join the forum and get notification of answers and new messages. You can unsubscribe with a single click. Bikez does not display, sell or misuse e-mail addresses.
Message text

Describe technical issues in detail to get quality answers. You can offer or request second-hand parts and equipment as a privat person. Bikez reserves the right to remove any improper or commercial content.
Accept that we store and display the message.  

 

More 1996 Yamaha TRX 850 information

Our discussion forums are intended for short messages. We also welcome more extensive motorcycle reviews.

Bikez also recommends that you check out the technical data and the riders' rating for the 96 Yamaha TRX 850. You can also rate it yourself. Use our efficient motorcycle classifieds to sell or buy this bike. Your motorbike gets a high quality presentation. Ads are free.