any ideas?

[johnl]

the bike is hesitant, seems to 'hold back' when you want to give it some beans.

I have changed the fuel filter, spark plugs, plug leads and coil pack.

It ticks over fine and revs freely at standstill in neutral.

Any ideas what it might be??

[_IT_]

air filter?

really badly balanced throttle bodies? ( On my GS I had a kink in the throttle cable which meant only one throttle was opening properly and it ran like a bag o poo)

[Boxadog 2000]

Could be water in the air box.

Remove the bungs and see what comes out.

Also check the valve clearances.

Bob

[Ruffy]

I had a similiar prob with mine and it was one of the coils seated in situ with a spark plug cap!

[Nick]

Hi

I had a similar thing, did the fuel filter but no better. Turned out to be the stick coil that connects to the spark plug. Got a second hand one from Motor works £14.00 Bike now runs great.

[johnl]

thanks for the replies.

I shall check out the air box. A new air filter was fitted less than 500 miles ago.

I will also check the valsve clearances.

All plugs/coil/plugleads have been swopped with my other s that works and this made no differance.

I shall push on and see what happens.

The only other issue is the clutch that was slipping, now does not. I am assuming this is because I can not get sufficient power to it, to make it slip. OR, might thew clutch have reached a new stage of impending doom and be causing the hesitancy?

U have a new clutch ready to go on on wednesday.

The joy of motorcycle ownership

[johnl]

well, i thought i'd solved it. I removed the air box drain plugs on both side and loads of water came out. perhaps half a pint in total. I was convinced this must have been the problem but having ridden to work this morning the bike is still the same.

My question,

with that much water mixed with a bit of oil in the air box will it have soaked the airfilter maiking it not be able to breath properly? I shall have a look when i get back from work today and see what it looks like.

again with that much water might some have got into the engine/ spark plug area causing issues??

any thoughts?

[johnl]

well i've checked the air filter and it seems fine, nice and dry.

i took the plugs out and turned it over and nothing came out.

stuck now

[oyster]

Early R1100S? Could be failing coil, it will cough and splutter at 4k + revs. K&N + Y piece installed? - could be running lean. - hesitancy at 4K + revs. Water in airbox once drained will not be a problem. A cupful is a lot though! Clutch slip is clear, motor revs but no power to the wheel, no hesitancy just revving motor. Otherwise an electrical fault, faulty connector or chafing wire.

[johnl]

i've changed the coil and that made no differance. The air filter is standard but there is a non standard exhaust. The bike ran fine with this set up 1 week ago.

The clutch slip has been happening for a while. I have planned to change it this week but with this new problem i'm not so sure.

[_IT_]

Failing hall sensor? im sure i read these give up anyone know the symptoms?

[johnl]

i think the hall sensor cause the bike to cut out when its hot. The bike keeps going hot or cold.

I have three days this week in which i had planned to change the clutch. I think i shall also strip down fuel tank ( again ) and clean all bits and bobs.

future thoughts -

the big brass screws on the throttle bodies. can they get blocked and not allow sufficient air through?

It may be electrical. I have changed the plugs, coil and plug leads. Is there anything else i should consider. TPS sensor? any particular chaffed wires I should be looking for?

Having ridden the bike a bit more it feels almost like it drops on to one cylinder when given either very light or full throttle. The puzzle continues.

[oyster]

Are the throttle cables properly seated above the throttle bodies? The brass screws are tapered and control air supply. They do get sooted and benefit from a clean, but unlikely to cause a cut out, just lumpy low speed and vibes. At WOT they have minimal effect. The list of checks for you is almost endless. Electrical connector plug to the fuel pump o.k.? Fuel lines good? Tank breather hose clear?

[_IT_]

The feeling of dropping onto one cylinder sounds like the way my gs felt with the kinked throttle cable, maybe check both throttles go all the way to the end stops when wide open?

[JoeC]

Not sure if this helps but are the fuel and breather pipes from the fuel tank caught on something? They can get crushed when putting tank back on.