Hi guys. Not new to the forum but been away a while and forgot all my log in details so i had to re register.

Got a small problem. was riding back from work yesterday in the rain and my bike started reving up to 4k rpm on its own. managed to make it to the pub and thought i'd worry about it in the morning.

This morning same problem. i rode it for about 15k then pulled over and had a little look. The tick over screw is right out so its not touching. the carb sliders look and sound as if they are hitting the stops when closing. The previous owner has removed the air box and put 2 small filters on the inlets, but this has never been an issue before.

The bike has been sitting for 2 years while i've bee overseas working, i removed the carbs last week, cleaned them, drained the brown petrol from the tank and filled up with fresh. and have since done about 400k.
It also has a pro duro exhaust.

I have to ride back to wales today (about 200k) and although the over reving isn't an issue when going over 40kph it does get a bit annoying at roundabout or traficligt speeds.

Anyone got any ideas please??

Thanks
Paul

strip and clean the carbs thoroughly sounds like the floats and the shut off valve is letting fuel through

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XT 630 SUPERMOTO

GSXR750L KMX200

RF900 & GSX400X Impulse Projects
3.9 V8 Rangerover

Hi wolfzero.

Gave the carbs a bloody good cleaning last week. But i've just managed to sneak out of the office for a closer look and it feels like the carb isn't closing fully unless i slam the throttle closed.
I guess the problem lies in either the cables sticking or the reurtn spring has lost some of its springyness (technical term that). I'll give it a liberal dose of WD40 and see how it gets on. Failing that i'll fabricate a new springing mechanism as a temp fix. and if all that fails i'll just have to ride round roundabouts a bit faster and time my approach to lights and junctions a bit better.

Thanks for the feed back

Paul

if the carbs are clean then def give the cables a good oiling with some engine oil wd40 is ok for cleaning and light oiling but i find engine oil is better for stuff like cables as it sticks around longer

__________________
XT 630 SUPERMOTO

GSXR750L KMX200

RF900 & GSX400X Impulse Projects
3.9 V8 Rangerover

Thats the plan long term.
For now the only tools i have are a leatherman and a can of WD40. Got to get to wales tonight as i fly to asia for a couple of weeks tomorrow morning. will give it a major overhaul when i get back

Many thanks

Paul

Hi Guys,
well i made it to my folks house in one piece,the reving got worse so i stopped to take the carbs off for a look and found that the primary inlet rubber had perished. so i bodged it back with pritstick glue (office paper glue i'd bought for my son) and a bit of sticky tape, wedeged the carbs in place with a bit of rubber hose, couldnt fit the air filters so ran it home another 200k reving at 6500rpm with the clutch in. Motorways wern't too bad,it crused quite happily with no throttle at 100kph.
round abouts and trafic lights and the occasional traffic jam were a lesson in clutch and brake control, and my arse pinced the seat a couple of times on wet roundabouts.

anyway. the carb is now off and my mate is going to sonic clean it in work. not quite sure what this entails, but he did the same to his carb and i came out looking brand new inside and out.

What i do need now is a set of inlet rubbers, but the only ones i can find are for the XT600, does any one know if they are the same. or where i could go to get some?
I will be in malaysia for the next 2 weeks and will have to order them over the tinternet so they are ready for me to fit once i get back.

By the way, i remembered my old log in details and i was once known as chiopompom?? blame the wife for that one.

Thanks in advance and ride safe

Paul