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t500 jetting with chambers
Posted: Tue Jun 19, 2012 5:01 am
by NY500
Have a 1970 t500 rebuilt from top to bottom with mild porting and titan chambers and stock air box,the bike had 145 mains and clip in middle position and it is running real rich,im in New york at sea level,can anybody give me a good starting point with jetting.Also was thinking about putting on Unifilters?????are they good or bad???????
Re: t500 jetting with chambers
Posted: Thu Jun 21, 2012 1:28 pm
by titan performance
Does your bike have the earlier 34mm carbs with hex jets?
All of ours have the 32mm carbs, with round jets.....stock size being 97.5. We find that the motors will run very nicely with stock jetting, BUT, you know that it will be running lean once the taps are open, due to the chambers. With the stock airbox, jetting up 2 or 3 sizes seems to keep it all in order. 102.5/105.
With pods, you will need to jet up a whole lot more, as these tend to flow more air than the stock airbox. Pods do vary, so you should do a plug chop to get it right, but we would recommend 115 or maybe 120 if you intend to ride it hard.
So I'm not too sure why it's running so rich?
Re: t500 jetting with chambers
Posted: Sun Jun 24, 2012 6:05 am
by Zook-e
Did you change the fuel tap to a non factory one?
Re: t500 jetting with chambers
Posted: Sun Jun 24, 2012 1:19 pm
by titan performance
Sorry Zook-e.......English figure of speach there !
Taps open = thrashing it !
Re: t500 jetting with chambers
Posted: Sun Jun 24, 2012 2:39 pm
by Zook-e
Re: t500 jetting with chambers
Posted: Mon Jun 25, 2012 2:12 am
by titan performance
Haha ! Correct, and my flat is near the pavement ! LOL.
Come on Zook-e, you know we speak the Queens English here !
I suppose you live in a flat and your car wears a bonnet too. 