engine problem

devildad · Post by **devildad** » Tue Mar 28, 2006 10:58 pm

I get a miss or burp, usually at low rpm. Will stall bike at idle. Any thoughts?

Post by **Skins** » Tue Mar 28, 2006 11:19 pm

Probably carburation, I reckon. What kind of carburation do you have?

devildad · Post by **devildad** » Tue Mar 28, 2006 11:30 pm

Mikuni's, the aft air filter is smushed to fit. The previous owner took the webers off and refit these. The burp has been with the bike since I got It.

Post by **Skins** » Tue Mar 28, 2006 11:41 pm

I've never worked on Mikunis (I have DelOrtos) but they probably also wear mostly at small throttle openings. Have you read my carb tuning advice in the 750 FAQ in 750 Discussions?

Also, Paul (that's his member name) has posted pics of how the throttle stop screw in DelOrtos makes a wear hole in the side of the slide, which causes big problems.

devildad · Post by **devildad** » Tue Mar 28, 2006 11:50 pm

thanks, I will give it a look

pope · Post by **pope** » Wed Mar 29, 2006 12:48 am

How are your ignition coils? If they are original, you may want to replace them or have them checked. I had a similar problem with mine and replaced the original coils with Dynas and the problem went away. Ny bike has the Mikunis on it too.
Doug

devildad · Post by **devildad** » Thu Mar 30, 2006 12:11 am

Coils are original as far as I can tell. What are Dynas? Where would I get them, Carbs look ok.

pope · Post by **pope** » Sat Apr 01, 2006 1:32 am

Here is their websight. I believe that you can get them through other aftermarket suppliers too:

http://www.dynaonline.com/english/coils.htm

I've go a picture of mine mounted up I'm pretty sure I used two single output, green, 3 OHM. If you send an e-mail address I'll send the picture to you. They make a lot of difference especially when starting, chopping the throttle and acceleration.

Doug