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How2 · September 6th, 2021, 05:50 PM

Hi

I have a 2004 250R with 2,100 miles that sat for a long time in a garage. It is in near mint condition.

This is what I have done to date:

- sonic cleaned carbs (all parts / jets) 3x
- wired through all ports and passages- they are clear
- New battery -
- contact cleaned all fuses
- new air filter (Universal foam/ Uni). no air gaps inside
- intake boots are near mint- no sign of cracking
- airbox boots fit snug against carb bell housing
- checked the airbox screws for tight fit
- replaced inline fuel screen ( universal exterior fuel filter now)
- cleaned tank fuel cock fuel filter
- cleaned fuel cock
- reamed tank air venting tube (checked for spider webs )
- reset valves (they needed it)
- new gas
- zip tied all vacuum hoses- (near mint condition)
- All the jetting is stock
- placed (1) .20 mm shim to accommodate California ethanol gas in the needle
- Check CV diaphragms for tears or flaws- they are all ok
- New coolant
- New thermostat (original was sticking closed)
- I checked the float bowl assemble to insure it was releasing completely without hesitation- it moves as it should
- I cleaned the float needle and seat contact points to insure they were not varnished or hanging up

The bike needs choke to start. After it runs for a moment is revs to about 4k rpm. I set the choke to run about 2,000 rpm. then drive off slowly. I presume this is normal for this bike.

Bike runs nice with some grunt after warm up and runs about in the middle of the temp range. At stop signs the temp gauge moves close to the hot zone.

Moving away from stop the temp gauge moves to the middle.

The obvious issue is that after the bike gets hot. When I drop the throttle, it comes comes down correctly, then hangs up momentarily at 2k RPM, then settles into idle at 1200 RPM (where I set it). That is exactly what the scenario is.

I moved the handle bars side to side to see if the throttle cables were hanging up the butterfly. No they are not. I checked to see if the butterfly was closing completely when the throttle is dropped. - it is.

I want the throttle to drop to idle with out hanging up.

Is the staring scenario described normal for this bike? In my experience with other bikes, its not.

Has any one seen this and have a solution?

thanks

September 6th, 2021, 05:50 PM	#29
How2 ninjette.org member Name: Me Location: zundar Join Date: Jul 2021 Motorcycle(s): None yet Posts: 10	RPM HANGS AT 2K - when hot Hi I have a 2004 250R with 2,100 miles that sat for a long time in a garage. It is in near mint condition. This is what I have done to date: - sonic cleaned carbs (all parts / jets) 3x - wired through all ports and passages- they are clear - New battery - - contact cleaned all fuses - new air filter (Universal foam/ Uni). no air gaps inside - intake boots are near mint- no sign of cracking - airbox boots fit snug against carb bell housing - checked the airbox screws for tight fit - replaced inline fuel screen ( universal exterior fuel filter now) - cleaned tank fuel cock fuel filter - cleaned fuel cock - reamed tank air venting tube (checked for spider webs ) - reset valves (they needed it) - new gas - zip tied all vacuum hoses- (near mint condition) - All the jetting is stock - placed (1) .20 mm shim to accommodate California ethanol gas in the needle - Check CV diaphragms for tears or flaws- they are all ok - New coolant - New thermostat (original was sticking closed) - I checked the float bowl assemble to insure it was releasing completely without hesitation- it moves as it should - I cleaned the float needle and seat contact points to insure they were not varnished or hanging up The bike needs choke to start. After it runs for a moment is revs to about 4k rpm. I set the choke to run about 2,000 rpm. then drive off slowly. I presume this is normal for this bike. Bike runs nice with some grunt after warm up and runs about in the middle of the temp range. At stop signs the temp gauge moves close to the hot zone. Moving away from stop the temp gauge moves to the middle. The obvious issue is that after the bike gets hot. When I drop the throttle, it comes comes down correctly, then hangs up momentarily at 2k RPM, then settles into idle at 1200 RPM (where I set it). That is exactly what the scenario is. I moved the handle bars side to side to see if the throttle cables were hanging up the butterfly. No they are not. I checked to see if the butterfly was closing completely when the throttle is dropped. - it is. I want the throttle to drop to idle with out hanging up. Is the staring scenario described normal for this bike? In my experience with other bikes, its not. Has any one seen this and have a solution? thanks