SOHC.co.uk Forums > CB500/550

swopping CB500 yokes for NSR125 ones

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Ewan 500 K1:
so...in building my cafe racer I increased the rear forks by 46mm (nearly 2 inches) ... On a test ride today I was getting a front end side to side twitch at 90mph, despite having a steering damper on and with it set at full damping. So, I need Triple T set with less offset to compensaet for the reduced trail caused by raising the rear end. I understand that the NSR125 triple T would do the the job ... can anyone offer any advice on what is involved in this modification ?
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Bitsa (Ralph Wright - RIP):
Ewan
Love the exhausts apart from the blueing.Not keen on cafes but I like the look of yours
Well done
Bitsa

Ewan 500 K1:

--- Quote from: Bitsa on June 15, 2014, 08:38:11 PM ---Ewan
Love the exhausts apart from the blueing.Not keen on cafes but I like the look of yours
Well done
Bitsa

--- End quote ---

Thanks Bitsa... now if it didnt have a twitchy front end, didn't chuck oil out and rune lean as twiggy the doin would match the lookin ... i can see another 12 months of refinment at this rate.

Trigger:
Ewan, because you have jacked the back end up you need to stiffen the front end. You could try a couple of washers in the forks to tighten up the springs a bit. This is the cheapest option. Do you still have the old springs in?

Ewan 500 K1:

--- Quote from: trigger6969 on June 15, 2014, 09:22:20 PM ---Ewan, because you have jacked the back end up you need to stiffen the front end. You could try a couple of washers in the forks to tighten up the springs a bit. This is the cheapest option. Do you still have the old springs in?

--- End quote ---
Hi Trig, yep its still the old springs that are in. I was warned that raising the back end that much would give it front end tank slapping tendancies .. which is why I fitted the damper,. I suppose if I hadnt fitted the damper and run it on max damping, this mornings twitchy front end might have been a bit more violent.

Do you reckon that stiffening the front foks would help get rid of twitching tendancies ?

Looks like the NSR yokes might be a far from simple solution. I'll maybe have a  look into billet yokes with a 10mm reduction in offset to 35mm, which should bring my trail back up to about 4 inches.

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