bikerpet Posted May 31, 2018 Report Share Posted May 31, 2018 I've just moved onto a Sherco with Keihin PWK carb, from a GasGas with Dellorto. I'm finding the throttle very light on the Keihin and a bit easy to wind on too far! Does anyone know if there is a stiffer spring available? Or perhaps a spring that could be coerced to fit? I've had a search but not found anything that mentions being stiffer. In reality I probably just need to get used to it, but I reckon I'll scare myself less with a throttle more suited to a heavy-handed user. Quote Link to comment Share on other sites More sharing options...
gasserguy Posted May 31, 2018 Report Share Posted May 31, 2018 Ask the Splat shop guys. They do lots of bits for these carbs ...... https://www.splatshop.co.uk/bikes.html Quote Link to comment Share on other sites More sharing options...
mikegas Posted May 31, 2018 Report Share Posted May 31, 2018 (edited) i had a medium and strong from Japan the only ones i could find ,have a look here https://japan.webike.net/products/369551.html Edited May 31, 2018 by mikegas Quote Link to comment Share on other sites More sharing options...
anotherfive Posted May 31, 2018 Report Share Posted May 31, 2018 Why not pack it out at the top with some fibre washers, cheap and variable Quote Link to comment Share on other sites More sharing options...
anotherfive Posted May 31, 2018 Report Share Posted May 31, 2018 Oh and one more thing as Adam Raga says the left hand needs to be accurate , the right hand you can get away with !!! Quote Link to comment Share on other sites More sharing options...
bikerpet Posted May 31, 2018 Author Report Share Posted May 31, 2018 Mikegas - thanks for that lead on springs. Have you tried them out? Any comments on how much difference each makes? I expect the medium is all I'm after. anotherfive - hadn't thought of that - is there room in there to pack out without restricting the slide opening? And as for Raga, therein lies the problem - the left hand is accurate OK, most often accurately in the wrong place! This makes it hard to get away with the right hand. Quote Link to comment Share on other sites More sharing options...
copemech Posted June 1, 2018 Report Share Posted June 1, 2018 put a slow throttle tube onit ffs! that is what they are for Quote Link to comment Share on other sites More sharing options...
bikerpet Posted June 1, 2018 Author Report Share Posted June 1, 2018 49 minutes ago, copemech said: put a slow throttle tube onit ffs! that is what they are for No, I don't want it slower, I want a bit more feel against the spring - just what I've got used to I guess. Feel and response are different things I reckon. Just like slowing suspension compression damping isn't the same as stiffening the spring - well sort of similar anyway. Quote Link to comment Share on other sites More sharing options...
nigel dabster Posted June 1, 2018 Report Share Posted June 1, 2018 Funny there was a guy easing a Dellorto, I've never ever thought of stiffening a kehin. What is your problem? You wind it on too much? Quote Link to comment Share on other sites More sharing options...
pjw123 Posted June 1, 2018 Report Share Posted June 1, 2018 Take it out & stretch it a bit. Typical trials rider cheapskate mod !!!. ( in a similar vein : If too stiff, cut a few coils off.) Has worked for me for over 40 years. Quote Link to comment Share on other sites More sharing options...
bikerpet Posted June 1, 2018 Author Report Share Posted June 1, 2018 2 hours ago, nigel dabster said: Funny there was a guy easing a Dellorto, I've never ever thought of stiffening a kehin. What is your problem? You wind it on too much? It just feels too loose/light. I reckon I can control it just the same as the Dellorto, just not the same feel. A feedback thing I think - doesn't feel like there's any feedback through the hand. I swapped the S3 grip for a Renthal yesterday - the S3 was bigger diameter. That has very lightly improved the throttle feel, although I quite liked the larger diameter for my hand size. Probably should just get used to it like thousands of others have. Apparently the OKO springs fit and are a bit stiffer, so a couple of options now. Quote Link to comment Share on other sites More sharing options...
nigel dabster Posted June 2, 2018 Report Share Posted June 2, 2018 I think you should be connecting motor to hand not hand to spring. A lighter throttle is much better for prolonged use Quote Link to comment Share on other sites More sharing options...
arnoux Posted June 2, 2018 Report Share Posted June 2, 2018 If you get an OKO carb spring (they are a copy of the Keihin) they are significantly stiffer than the Keihin spring. It's a good and easy conversion. Quote Link to comment Share on other sites More sharing options...
heffergm Posted June 2, 2018 Report Share Posted June 2, 2018 I'd suggest waiting. You'll get used to it. I can't ride the Dell'orto, the throttle is insanely heavy to me. Which is to say again, you'll get used to it. Quote Link to comment Share on other sites More sharing options...
bikerpet Posted June 3, 2018 Author Report Share Posted June 3, 2018 Thanks everyone. 2 options I'll keep in mind: Do nothing. Or try the oko spring in a month or so. I'm sure this is just a personal preference thing, no right or wrong answer. For a few dollars it's no big deal to experiment anyway. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.