TPS Adjustment Step-by-Step Pictorial Guide

Thanks TSM. what size screws and type do I use to replace them with?

[Nobbylad]

Take the bolts to B&Q, Screwfix or local DIY shop and get some the same size. Just go for plain allen key bolts as opposed to security torx bolts.

Just done this to my k3, the line was at the very bottom on idle, 20 mins of fiddling had it in the middle at idle and top at about 2000rpm. Easy enough mod, about 30 mins to do, cant say i notice tones of difference but not been on a proper ride yet.

Bolts were fine, easy to undo and no cheeseness! Used a set of brand new security hex keys from halfords £13.

Only mistake i made was to completely remove the sensor cover not just losen the bolts, thats what you get for not reading it properly !

Good guide though many thanks!

Finally done it.

Did mine today, amazing difference - soooo smooth now, can't believe I didn't do it earlier.

Took about an hour from start to finish but that was mainly because it took me ages to get the setting just right, it's a bit fiddly isn't it!?

If you haven't done it already, get your toolbox out and do it asap.

Out of curiosity, are all bikes affected by this? I have the K9 and didn't notice the symptoms or maybe I just learned to live with them. I wonder if I should attempt this, it looks simple enough.

i did it and it's feel good! Thanks!

I've been paying attention lately to my revs at various low speed scenarios and I can't seem to ride under 3000rpm so the mod may not apply to me at all. Can't seem to tell any roughness either.

I did the mod (k5 bike) no problems took about 20mins. It was set at about 3500rpm, I set it to 1500. Didn't notice any difference on my commute the next morning, but then most of that is 4000rpm+. I did notice the difference when I got into town at lower speeds, engine breaking doesn't feel quite so abrupt but is still strong and the gentle on/off throttle inputs at lower revs feel smoother. Overall pleased with the result.

[Bibio]

Originally Posted by maxinc

I can't seem to ride under 3000rpm so the mod may not apply to me at all.

that's exactly what the adjustment is for. roundabouts in particular are a pain without it unless you have mastered the clutch and throttle action. it smooths the lower rev range out to give you better control (reduces the snatchiness).