South West Bikers | Motorcycle Forum

The gsxr solo is straightforward up there btw so there's something in the fjr being a lump.

I have seen a BMW rt(?)1600 two up doing porlock hill and I must say I was impressed.

Kata wrote: ↑Oct 17th, '18, 21:54 The gsxr solo is straightforward up there btw so there's something in the fjr being a lump.

I have seen a BMW rt(?)1600 two up doing porlock hill and I must say I was impressed.

Having gone through the obvious I'd be looking at the suspension setup as it could be the steering geometry is off causing it to run wide. I'd definitely check the preload front and rear (static / rider sag) as too little will cause the bike to drop at the front and / or back which will throw the geometry out. If the bike is of an age then it might be worthwhile having the forks / shock refurbished.

pieeater wrote: ↑Oct 18th, '18, 12:42

Kata wrote: ↑Oct 17th, '18, 21:54 The gsxr solo is straightforward up there btw so there's something in the fjr being a lump.

I have seen a BMW rt(?)1600 two up doing porlock hill and I must say I was impressed.

Having gone through the obvious I'd be looking at the suspension setup as it could be the steering geometry is off causing it to run wide. I'd definitely check the preload front and rear (static / rider sag) as too little will cause the bike to drop at the front and / or back which will throw the geometry out. If the bike is of an age then it might be worthwhile having the forks / shock refurbished.

At 30-40mph + maybe, but I'd suggest that at walking pace suspension set-up will make cob all difference. You could replace the shocks with lumps of wood and it wouldn't affect things too much. I think these things can be over-thought a little. JFDI.

[/quote]

. . . . . . . At 30-40mph + maybe, but I'd suggest that at walking pace suspension set-up will make cob all difference. You could replace the shocks with lumps of wood and it wouldn't affect things too much. I think these things can be over-thought a little. JFDI.
[/quote]

Succinct and to the point, and correct!

JFDI - !

Running wide is usually caused by turning in to early and target fixation when you start running wide. The fjr is quiet stable at low speeds even when fitted with panniers.

Yep it's stable at slow speeds.

Think your right. Going to try Mr B's suggestion. First with gsxr to get confidence back then again with the fjr.

Is your pillion experienced, could be pulling you wide.

If you approach said bend with at least 60mph and brake hard to the apex whilst looking as far ahead as possible (not fixated at the tarmac right under you) just point and squirt - simples

ptolemyx wrote: ↑Oct 19th, '18, 18:07 If you approach said bend with at least 60mph and brake hard to the apex whilst looking as far ahead as possible (not fixated at the tarmac right under you) just point and squirt - simples

Anybody tried Millook near Bude 2 up on a biggish road bike , i have only ever done it on the the big thumper honda trailie tpye thing

This looks useful.
https://youtu.be/-qJXO4CZ9S0

This looks useful.
https://youtu.be/-qJXO4CZ9S0

TLS-Moose wrote: ↑Oct 19th, '18, 08:54

pieeater wrote: ↑Oct 18th, '18, 12:42

Kata wrote: ↑Oct 17th, '18, 21:54 The gsxr solo is straightforward up there btw so there's something in the fjr being a lump.

I have seen a BMW rt(?)1600 two up doing porlock hill and I must say I was impressed.

Having gone through the obvious I'd be looking at the suspension setup as it could be the steering geometry is off causing it to run wide. I'd definitely check the preload front and rear (static / rider sag) as too little will cause the bike to drop at the front and / or back which will throw the geometry out. If the bike is of an age then it might be worthwhile having the forks / shock refurbished.

At 30-40mph + maybe, but I'd suggest that at walking pace suspension set-up will make cob all difference. You could replace the shocks with lumps of wood and it wouldn't affect things too much. I think these things can be over-thought a little. JFDI.

Fair enough - I just thought that if the geometry is out then the center of gravity would be too which could affect low speed steering round bends, going up such a steep incline would also affect the center of gravity which could compound the problem. I may well be guilty as charged of overthinking the problem though it just seems a shame that an otherwise capable bike appears to be having these issues.

Actually imho the suspension can have an effect at slow speed. More the front forks than the rear.

If I change between neutral and slight acceleration there's fair bit of fork movement. Think that's due to the back sitting to far down as the stndars rear shock isn't really first for purpose on the FJR.

Yes it would help if I was smoother but the clutch is hydraulic and a bit on-off compared to the slick gsxr cable actuated one.

Excuse 23 (c) me 2018

Got to say have not done a lot of 2 up riding but when I do it is not that enjoyable as a ride. That said Gixxers are not the best bike for 2 up riding and basically all of the weight of the passenger ends up leaning on the rider so not so great. From a handling perspective just due to the extra weight it is going to make changes to everything you do as speeding up, slowing down and turning will require you to move more mass then usual. Feels odd....