Topic: Surging

[Rocking-M]

The 750 seems to be running great but I cranked it a bit today and
it seems to surge when it hits 7k on up. It's a stock bike as far as I know,
with a k&N air filter in the box. I've had the carbs syncroed, new plugs,
and set the points (still waiting on my electronic coversion to get here).
I plan to recheck the points sometime Saturday and I've not adjusted
the cam chain yet.

[750goes]

Surging could be a slight fuel imbalance - does it happen straight away at 7k or after a some elapsed time at a constant 7k - any chance of doing a plug chop- - that may give you an indication if its fuel related by the colour of the plugs

thats my brain thoughts

[einsteingarage]

If you are checking plugs this may help.


http://www.dansmc.com/Spark_Plugs/Spark_Plugs_catalog.html

[Rocking-M]

Thanks. I'll check today and the plug page is great.

[einsteingarage]

I had this in my dirtbike bookmarks but I think it may help..

http://www.motocross.com/motoprof/moto/mcycle/carb101/carb101.html

[Rocking-M]

I had this in my dirtbike bookmarks but I think it may help..

http://www.motocross.com/motoprof/moto/mcycle/carb101/carb101.html

Great article. The surging is at full throttle now. It would seem that the main jet is the problem, but I also run at 3000 feet so
perhaps I'll run it down off the mountain one day and see if it still surges. Could be an altitude thing. I'm slipping cause I forgot
that tidbit. Been running fuel injection to long