Query approved.

The idling is set wrong. Warm the engine and set the idling (Rotate the big brass (golden) screw till the rpm settles at 1.3-1.4k. If you don't know how, then ride the bike for sometime and then take it to a mech (DON'T set it when the engine is cold)

BTW is your bike new?

^^ +1. set idle when engine is warm.

Who did this? Mechanic or yourself? And when was this set? When the engine is cold (just started) or when the engine is warm (after idling or riding for 15-20 minutes)?

i never meddled with the idling screw. It was set when got it.

Ok, then you may want to try the suggestions provided above by JD & Social & post the update here.

I got it on july 14th 2010.

thanks a lot bro. hope i figure out why it happens. and soon.

With idle set to 1400 RPM when properly warmed, after a long ride is is normal to get higher RPMs, but how high depends on whether it was set correctly when properly warmed.

If you adjusted for 1400 when it was properly warmed, you WILL NOT get 1400 when it is cold. When you start it, it will be less than 1400, it will very slowly rise to 1400 as your engine warms up.
If you adjusted for 1400 when it was NOT properly warmed, you will get MORE THAN 1400 when it is warm. When you start it, it will be 1400, but it will very slowly rise to more than 1400 as your engine warms up.

To adjust the idle, first you have to find the idle screw. I have not seen a P135, but i'll tell you how you may find it. When the engine is off, rotate your throttle up and down, (accelerate/decelerate) while looking at the engine closely. You may want someone to help you. You will observe a part moving along with the throttle. This is the throttle lever, and is connected to the throttle via a cable. There should be a screw touching this. It can be adjusted by hand, to keep the throttle more open, when there is no throttle applied by you.

Do this adjustment only after you have warmed the engine (ride ~5km). While the engine is on, make very small turns, carefully observing your new RPM. Do not touch the throttle when making the adjustments. Wait for the RPM to settle before adjusting again. When you are done, rotate the throttle once or twice to make sure that the idling speed does not change. If it changes, re-adjust.

(copied from post in earlier query)



a lot about idle adjusting has been discussed there.

Check for the rubber washer in the idling screw, some times it will block the idling air passage. I have seen this problem in pulsar and finaly i figured it out. IF the rubber washer blocks Idling path, you will be facing rouch idling issues.

thanks a lot bro...... your observation is just perfect..... thank you everyone!!

@Ayson: that explanations was really good...even in my P220 FI, I noticed a problem with idling...usually it's set to 1.5K rpm...but after few servicing, i found it revving up to 2K...I will check out the idling as u stated...