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 Post subject: Fatter on the rear cylinder?
PostPosted: Thu Aug 24, 2017 11:37 am 
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Joined: Sat Feb 25, 2017 11:51 am
Posts: 191
HI,
Do you guyz intentionally fatten up the jetting on the rear cylinder of a pantah as standard practice. On a street bike is that worth while? I probably wont be riding it hard enough to make it glow in the dark.
Meaning, front cylinder is jetted leaner than rear as a norm?

Thanx,
Clay


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 Post subject: Re: Fatter on the rear cylinder?
PostPosted: Fri Aug 25, 2017 7:34 pm 
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Joined: Thu Oct 14, 2010 11:23 am
Posts: 1180
Well, the Pantah and F1 manuals list differences. And they seem to be necessary. From as little as 3 (say 135/138 front/rear on smaller carbs in small engines) to 10 (say 165/175 on larger ones in big engines). But don't forget to go for the tan/gray/lavender (lean is mean) look on the insulator, rather than just making everything coal black like I have seen on sooooo many heads/plugs. I find the H head tends to run rich, so sometimes down-jetting that is a good answer. Oddly, the plugs/heads on my TT900SS with 40mm Dellortos are happy at 162 on both; that with the V exhaust out the back and the carb in the breeze. If I was not so lazy I would go to 160 on them. So, there is my 2 cents worth. MikeV


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