I have an old Thunderace, is it worth dumping the exup valve and will it make any difference to the performance, i accept the bike will need to be retuned if it goes.
I'd keep it, helps with midrange. Helps if you have a fruity can too, you can keep the noise down through villages etc. Interestingly enough performance car makers are fitting these to cars now.
I'd keep it, helps with midrange. Helps if you have a fruity can too, you can keep the noise down through villages etc. Interestingly enough performance car makers are fitting these to cars now.
Definitely keep it!!! I had a Thunderace myself (there's a pic of it in my albums) had a Quill or Art can on it ....... loved it and it really helps, the only time I had an issue was when it got stuck open and the performance did suffer.
The rev counter misbehaves too if its sticking or is taken off.
Just get it tuned at a Dynojet place if you were going to spend money on it anyway
Depends what ynt to do with it really.... Losing the valve only has any benefits if ya junk the exhaust for a large bore race system then you'll need a dynajet stage 3 kit to make it work plus dyno time. If you just looking to make it a little livelier then sports can, free flowing filter and keep the valve would be best bet
Steve
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