What's my problem ?

[Gecko]

1999 R1100GS , 82000km left hand drive

Pulls like a train from still but accelerating from middle of the rev range it feels like it is being momentarily held back as if it is approaching a power band and then woosh - off it goes again like it should . This has only become apparent recently i.e the last couple of rides . I thought it may be the beginning of clutch slip seeing as I am still on the original clutch since new. Today MiGSel helped me adjust the clutch cable and it doesn't seem to have made much difference but I'm not convinced it is a clutch problem because as I mentioned lower revs it pulls like it always has done.
When I got back home tonight I checked the throttle balance and it was only a bit off but when removing the small rubber plug from under the right throttle it seems to contain a small amount of oil - not petrol most definitely oil .

Any ideas what might be going on or things I should check ?

 

[Gecko]

Checked the valves today and inlet valves on the right were quite a bit off - so much so in fact that I couldn't get the feeler gauges in at all. Now adjusted and road tested the problem is still there. Throttles balanced and bike feels very smooth but it's still got the lag in the pick up.....very odd ???

 

[Big Lad]

Does the rear end squat as it happens, almost as if the rear breaks away ?. Just wondered if it was the bike slipping out of third gear?. Other than that, hall sensors ?

 

[Tarka]

I could be wrong here (and you`ll be hoping that I am) but I seem to remember reading that if,while accelerating hard in 3rd gear upwards,the bike sort of feels like a giant`s hand is kind of holding it back,or moving it back and forth ever so slightly for a second or so,then it`s a portent of doom within the gearbox...
As I said,that may well be incorrect,but I`m sure I read it on the forums somewhere.

You may just have a dodgy HT lead/plug or shitty fuel filter,perhaps ?

 

[(RIP) Kaister]

the bike sort of feels like a giant`s hand is kind of holding it back,or moving it back and forth ever so slightly for a second or so

are you reading a scarey book at the moment....

 

[boxer]

Gecko.

I may be very wrong on a number of counts here, but didn't you start a thread concerning oil flowing from the balance take off tube today? I can't find he thread now so if I'm mistaken - sorry.

However, I have a recollection of reading a past post in this technical forum concerning someone who was getting a considerable amount of oil in the air filter housing [*NOT* the compartment below the air filter housing the engine breather dumps into]. I remember this because it seemed so unusual.

If I remember correctly there was crack or very serious damage to [I think] one of the inlet valves or one of the caps that retain the shaft the rocker arms rotate about.

Given the fact an inlet valve was tight, you may have oil in the throttle body and may be I didn't imagine the 'oil in the airbox' thread it might be worth removing the valve covers and checking for cracks.

Russ.

 

[Tarka]

are you reading a scarey book at the moment....

....Maybe...

 

[Mzokk]

Think I'd do a wet compression test. To make sure you haven't burn a valve.....you said you couldn't get the feeler guage in so the valve seals/valve may be burn't. Might only be a dodgy valve stem oil seal. Either way the head will likely have to come off!!

 

[(RIP) Kaister]

Is it like a dip in the torque curve - where it goes all lean ?

Have you fitted a chip lately ?

Have you changed the silencer lately ?

Sounds like harmonic imbalance in the inlet tract - caused by possibly valves, exhaust or fuel.

as suggested

compression check
loosen valve clearances.
re-fit std pipe - to check

 

[BBB61]

Is it like a dip in the torque curve - where it goes all lean ?

Have you fitted a chip lately ?

Must be that bargain chip he got off Ebay.

Bob

 

[MiGSel]

Must be that bargain chip he got off Ebay.

Or the code plug he removed...

Restore those things, then test again.

Two quite likely causes I'd say!

Cheers,
Michel

 

[Gecko]

Gecko.

I may be very wrong on a number of counts here, but didn't you start a thread concerning oil flowing from the balance take off tube today? I can't find he thread now so if I'm mistaken - sorry.

However, I have a recollection of reading a past post in this technical forum concerning someone who was getting a considerable amount of oil in the air filter housing [*NOT* the compartment below the air filter housing the engine breather dumps into]. I remember this because it seemed so unusual.

If I remember correctly there was crack or very serious damage to [I think] one of the inlet valves or one of the caps that retain the shaft the rocker arms rotate about.

Given the fact an inlet valve was tight, you may have oil in the throttle body and may be I didn't imagine the 'oil in the airbox' thread it might be worth removing the valve covers and checking for cracks.

Russ.

Thank fully that mystery thread wasn't one of mine
The valves have now been adjusted and the bike is running sweet and true - no more oil seen in the rubber plug under the throttle body and no oil in the airbox so I'm going to start with the cat code plug and choose between riding a bike that surges or one that hesitates and then work backwards from there .....still glad I'm not on a 1200 though

I've made various modifications including Remus, chip and other bits but these have all been done of a considerable period of time i.e. not all recently in one weekend. It's odd that this problem is only just now manifesting itself as I haven't changed anything recently.

 

[Big Lad]

Thank fully that mystery thread wasn't one of mine
The valves have now been adjusted and the bike is running sweet and true - no more oil seen in the rubber plug under the throttle body and no oil in the airbox so I'm going to start with the cat code plug and choose between riding a bike that surges or one that hesitates and then work backwards from there .....still glad I'm not on a 1200 though

I've made various modifications including Remus, chip and other bits but these have all been done of a considerable period of time i.e. not all recently in one weekend. It's odd that this problem is only just now manifesting itself as I haven't changed anything recently.

Sorry, thread hijack. I have a small ammount of oil coming from the l/s throttle body. It's hard so say exactly where it flows from, but I wipe a couple of drops off every week or so. It's always along the underside and collects on the small bolt on the underside behind the rubber cap. Valve clearances too tight ????. The bike is running brilliantly with no problems.

 

[Big Lad]

Talkin' to myself here !. Anyway, pulled the air tube from the rear of the TB and realised the oil was coming from a very small pool of oil on the inside bottom of the tb, no more than 1/4 of a thimble full. The O ring was a lttle worn so I put one from an old TB on it and put it back together again. A small bit of oil was under the metal strainer,under the air filter, but none inside the airbox itself. I pulled the screw at the bottom/rear of the airbox and no oil came out. The bike runs brilliantly with only a tiny bit of oil consumption. My only guess is that at some point it was over-filled and blew thro' the TB into the box. That sound about right anyone ????? Cheers

 

[Wizard]

Que tumbleweed.

 

[Big Lad]

......distant church bells........

 

[Bikergary]

I've made various modifications including Remus, .

It's not a revelotion by any chance, with the baffles out? I noticed a very similar problem when I fitted the remus revolution and took the baffle out?

Just a thought, though you did say you did it a while ago?

like to know how you resolve it though.

 

[Fanum]

Marc......a pure guess here but it sounds like one of the jubilee clips holding the throttle body on is loose and may be letting air in.

You really ought to tighten it quick before it allows the mixture to explode in the pipe which will blow it off and make you foul your trews, probably at an inconvenient time like when abroad.

Don't say I didn't warn you

Love and kisses

Bill

 

[Panzer Patrol]

Compression check - tight tappets = nibbled valve or scorched seat, sorry! my 2p worth