New product release - smooth ramp PW3/JS2 cam

'Reduced offset in the yokes increases trail, and makes the bike more stable at speed, not less. Maybe you meant something else?'

What I know is this - if you increase the yoke offset on a Seeley with 27 degree rake, to about 55mm - the bike can stand up under brakes and turn the wrong way throwing you off-balance. Most bikes are designed to become stable under brakes and self-steer slightly under acceleration. My bike has about 30mm yoke offset and is stable in a straight line, however it tightens it's line a lot if gassed when leaned over. I'm comfortable with it, however I wouldn't want the hard lesson again on a big circuit such as Phillip Island. If it goes wrong, it can happen at extremely high speed and the problem is it can come from nowhere and catch you by surprise.
The last time I had such an experience, I decided to crash the bike on the grass verge. When I turned it on again to get there, the bike came out of it's difficulties. I was GONE, but 'arse beats class'. - It wasn't rider skill ! If you are relaxed when riding and sensitive to how the bike is handling, you might get some indication of what might happen under extreme conditions when the offset is wrong, however I got caught and so did my friend the year previously - we are both pretty experienced.
How much do you think the rake changes between braking and acceleration on any bike with a fairly short wheelbase ?

The fella standing with me is Allan Greening, he rode the bike the previous year and told me the bike had stood up and turned under brakes. I thought he must have imagined it. Just after this photo was taken, it also happened to me - bigtime !

Acotrel

This thread is about a new camshaft. It would be better if you started a new thread if you want to discuss fork angles.

Sorry, that has been done under the title 'triple clamps'. Didn't mean to hi-jack your topic, the discussion just went that way. I'm very wary about using cams which cause the power to come on with a bang. They can stop the rider from being SMOOTH. - That is important to staying alive. When you use your cam in a motor which has a 2 into 1 exhaust, how much do you change the timings to suit the different pipe ?

acotrel said:

Sorry, that has been done under the title 'triple clamps'. Didn't mean to hi-jack your topic, the discussion just went that way. I'm very wary about using cams which cause the power to come on with a bang. They can stop the rider from being SMOOTH. - That is important to staying alive. When you use your cam in a motor which has a 2 into 1 exhaust, how much do you change the timings to suit the different pipe ?

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I only suggest one timing. I haven't tried different timings for different pipes. That's dyno work for the customer.