www.boxertrix.com

Hi,

Finally got my bike back together and MOT'd after about 7 months off the road.

Only one problem now, its really lumpy at low revs, it fine at higher engine speeds but I'm having to rev it and slip the clutch a lot to pull away.

What/where should I check first?

Thanks,

Jon

Simple stuff first, especially after its been off the road a while.

Plugs
Fresh fuel? Throw a tank of premium in there.
Nothing nesting in the air filter housing?

After that, stick coils maybe? They have been known to play up.

I'd hazard a guess at a stick coil having gone. Easy to check - while the engine's ticking over, disconnect the low-tension lead from each coil in turn and see if there's any difference in the engine sound. I parked my ST up one November, it had been running fine - dug it out the following March, symptoms just like yours.

I always carry a spare main, and one of each of the secondaries now.

Pete

Hi,

Thanks,

I had a stick coil go before it only effected high speed running. This does seem similar just at the lower rev range. Can a faulty coil affect the running at any speed?

Regards,

Jon

On mine, it was definitely more noticeable at lower revs - slipping the clutch was the only way I could set off without the bike feeling like it was going to stall. I could also feel it at higher revs, the bike just didn't feel as if it had as much 'go' as it should have done.

Definitely worth checking.

Pete

Same with mine, certainly noticeable at low revs.

Mine felt like that after I'd rode my GS for some time then I was reminded about the R1200s throttle and the need to give it a handful when setting off but it did feel a little odd. Throttle bodies were balanced and tappets done. Next up is a re map

Are the bungs still on the stubs that you attach the tubes for a vacuum meter to? Maybe bleeding air in to one or other throttle body?