GS1100, wont rev past 6000 RPM

[JohnC]

Cheers for the help both. Moto, I'm sure this problem has been with the bike since purchase. I did do the Motronic reset once more but it made no difference. The battery is brand new and the contacts clean and covered with Vaseline. I use an Optimate every night. I remember the ABS lights coming on a couple of times after I had just bought it, both times after accelerating hard in the lower gears, so a good chance it was hitting the rev limiter without me knowing it. I'm sure the ABS light is directly related to the rev counter problem. The service manager took the bike out himself and agreed that yes it wasn’t revving over 6.5K on the counter (in any gear), and that the ABS warning light came on with him. Just very strange that he said it was the rev limiter cutting in (at 6.5K ) that was causing the ABS lights to flash as a fault!!

Roddy the rev counter looks a right pig to get out, Moto I've never been keen on revving bikes while not under load, I was always told never to rev a bike when it's NOT under load, i.e. in neutral, and as it's still under warranty I'd rather the service bods tried all of the above, but I'll mention it to them when I phone back on Tuesday. I'm still keen on hearing your views re his comment that the bike wont rev as it's been 'run in tight'.

I'm kind of leaning towards Roddy's diagnosis, of either hall sensor/motronic problem or a duff rev counter. I mean, if the service manager says the rev limiter is causing the ABS warning light to kick in then surely it must be hitting 8K for this to happen. I reckon they have too many GSA1200 to PDI and they simply cant be stuffed looking for the problem.

Oh and does anyone else think I should be paying for plugs and a filter when this hasn’t cured the problem one bit?

 

[Steptoe]

Have you got the original ABS rings fitted.

If you've got later ones fitted, they can cause the ABS system to go wobbley, and the lights come on at high wheel speeds

 

[JohnC]

Have you got the original ABS rings fitted.

If you've got later ones fitted, they can cause the ABS system to go wobbley, and the lights come on at high wheel speeds

Yes but surely high wheel speeds would be sitting at a ton on the m/way and not while going for it in first or second gear (this is when it seems to happen). I'm not sure about what version of the ABS rings I have, afaik it's all bog standard 1999 vintage. Cheers for the suggestion anyway Step.

 

[JohnC]

Delaers going to have another look at it

So hopefully it will be soon be sorted, just in time for my run round the coast of Ireland

 

[roddy]

John

could you let us know the out come of this as my GS is of the same fine vintage, and this sort of thing is handy to record on the website for future reference.

cheers

 

[JohnC]

Will do Roddy.

 

[(RIP) Kaister]

I've never been keen on revving bikes while not under load, I was always told never to rev a bike when it's NOT under load, i.e. in neutral,

unless the dealer has a rolling road - thats EXACTLY what they'll be doing with your bike in the workshop.

i'd have them put it on their test rig and check the engine revs by plug pulses using an HT clamp as the first thing - take 2 mins,

 

[JohnC]

Well after some intervention from the dealer and a few conversations with the service manager the mechanics seem to have found the problem(s). Well done anyway lads

One knackered rev counter and once knackered ABS sensor on the rear wheel. Apparantly the rear ABS sensor had no shims in it (dont ask me how this happened as I havent a clue) and had ground down against the ABS ring The mechanic was amazed that it was still working, just shows how reliable/tough the old ABS systems are.

When the bike was hitting the rev limiter (which was happening due to the rev counter not showing the correct revs, and I guess my unsympathetic ears and right hand ) the ingnition was momentarily cutting out and tiggering the ABS warning, perhaps due in part to the worn rear sensor.

 

[Steptoe]

The mechanic was amazed that it was still working, just shows how reliable/tough the old ABS systems are.

Also shows what a shite mechanic checked the bike in the dealers. NOT NOTICING A FECKED SENSOR WHEN IT'S BEEN WORN AWAY AGAINST THE WHEEL, WHILE LOOKING FOR AN ABS PROBLEM.

FFS