Home. Back. ...... The Gas Gas Guru. Technical Information.

I live in Victoria,B.C. ,on Vancouver Island. My riding conditions are: temperature ranges from -2 to 15 degrees celcius, wet and muddy in the winter,dry and dusty in the spring/summer.the humidity today is 93%. We generaly ride very tight trails with lots of hills and rocks that we ride up. I normally ride in 3rd gear with alot of idle to half throttle use. The bike always gets a good full throttle clean out at the end of our rides. I run Chevron 94 octane fuel with opti oil (100-1) I still don't feel comfortable at that oil ratio ! I hope this is enough info if not e mail me if you need more.By the way,your web site says "server cannot be found" It started to do it this week.

Thanks Paul


Lets give the following a try, assuming that everything else, including the reeds, float level, muffler packing etc., is o.k.

Main jet: 116
Pilot jet: 35 or 36
Needle: 2 from top
Mixture screw: 3 or 4 turns out
NGK BP5EV or Bosch WR8DP plug set at .024"
Oil mixture at 80:1- full synthetic (same as I run my 96' 370 at)

To adjust the mixture screw, start at 3 or 4 turns out. Blip the throttle lightly and quickly, and adjust the screw in or out to give the best response. The mixture screw influences the first 1/8th of the throttle setting and has a big affect on throttle response. Gas-Gas recommends 95 octane. If you have any amount of pinging, at any throttle setting, mix about 30% unleaded race gas.

Let me know if this helps.


Professional tuner and 'Trials Competition' writer Jon Stoodley has very kindly stepped up to the plate to answer your questions. If you're having problems, or need some advice just send an email to Jon. If it's something that could be useful to others, we'll post it on the site.
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