Suzuki GR650

[Leroydebeer123]

Hi, I am getting a pretty good looking Suzuki GR650 - time to step up from the Suzuki Grass Tracker. Any of you guys know much about the bike? (GR650), are parts for the bike common and available? I am assuming not likely as the bike was only manufactured for 4 years or so.

[jellywrestler]

Hi, I am getting a pretty good looking Suzuki GR650 - time to step up from the Suzuki Grass Tracker. Any of you guys know much about the bike? (GR650), are parts for the bike common and available? I am assuming not likely as the bike was only manufactured for 4 years or so.

Pretty much an orphan

[Grumph]

Hi, I am getting a pretty good looking Suzuki GR650 - time to step up from the Suzuki Grass Tracker. Any of you guys know much about the bike? (GR650), are parts for the bike common and available? I am assuming not likely as the bike was only manufactured for 4 years or so.

Wot Jelly said - i seem to remember Suzuki NZ brought in a very small number as a trial. Not popular. Different enough from the rest of the twins range to be awkward. Top end would sell to Postie twins racer to go on a 450....
Parts - as in consumables, oil filter etc no problem. Odd bits, probably ebay.

[Oakie]

Never heard of it. Nice comfy looking seat though. I ride a bike a bike that is just about as common in NZ (ie, I've never seen another one) but it is really just a detuned GSXR with a few cosmetic differences so I don't have parts issues. You may though. As always ... caveat emptor!

[awa355]

I always wanted one, now I don't. I'm sick of owning sensible bikes. :(

[spanner spinner]

Pretty much an orphan

what he said, one off engine nothing in common with any other model. AND they like blowing the centrifugal clutch apart on the end of the crank for the dual mass flywheel setup. would have to throw away cheap to even bother looking at it as if it goes bang that what you will be doing.

[GrayWolf]

Hi, I am getting a pretty good looking Suzuki GR650 - time to step up from the Suzuki Grass Tracker. Any of you guys know much about the bike? (GR650), are parts for the bike common and available? I am assuming not likely as the bike was only manufactured for 4 years or so.

pretty honest owner review.......
http://www.realclassic.co.uk/suzuki_gr650_tempter.html

I had an XS650, damn good wee twin, but vibrated like a bastard, and starters always fail, but does have a kick start.... XS's do have one potentially serious weak spot, the points cam 'shaft' it's quite long, no 'bushing' so runs directly in the head alloy, so can get 'wobbly' ... some versions had an electronic ignition/points replacement. So the aftermarket units like boyer or pirahna still use that 'points shaft'.

[Grumph]

what he said, one off engine nothing in common with any other model. AND they like blowing the centrifugal clutch apart on the end of the crank for the dual mass flywheel setup. would have to throw away cheap to even bother looking at it as if it goes bang that what you will be doing.

When i read this I wondered if we were talking the same bike...."Centrifugal clutch on end of crank" is the normal Suzuki GS series starter clutch - with known failings, yes, and known fixes too. Gearbox uses a pretty robust conventional clutch.
"dual mass flywheel setup" is simply the normal GS twin balance shaft...which gives no problems whatsoever - even under race conditions.
I believe that the bottom end is very similar to the 450/400 twins except it uses a hyvo camchain. I know it is possible to swap the 450 crank straight in.
i see it has a 5 speed box in the space where the smaller twins have a 6 speed. probably possible to put the 6 speed in it too.
If it goes bang, there will probably be a line of postie twin racers after the barrel and top end....

[Leroydebeer123]

Cheers for the quick replies. I did not pay much for the bike so if it does go south, then so be it! Had a mechanic look over it and there were no issues with it. It will make for an interesting project.

[Oakie]

I think it's quite a nice looking bike and I hope you get a good run out of it.

[spanner spinner]

When i read this I wondered if we were talking the same bike...."Centrifugal clutch on end of crank" is the normal Suzuki GS series starter clutch - with known failings, yes, and known fixes too. Gearbox uses a pretty robust conventional clutch.
"dual mass flywheel setup" is simply the normal GS twin balance shaft...which gives no problems whatsoever - even under race conditions.
I believe that the bottom end is very similar to the 450/400 twins except it uses a hyvo camchain. I know it is possible to swap the 450 crank straight in.
i see it has a 5 speed box in the space where the smaller twins have a 6 speed. probably possible to put the 6 speed in it too.
If it goes bang, there will probably be a line of postie twin racers after the barrel and top end....


Nope not the normal twin balance shaft setup, it has a centrifugal clutch which locks up a low revs and adds a extra mass to the crank. it disengages at 3000rpm so the bike revs easier. when they go bang you can fix them by either taking them off which looses the bottom end torque or you lock them up which means they are slow to rev at higher rpm. see http://contemplativemotorcycling.blogspot.co.nz/2009/10/in-praise-of-gr650.html for some one else's opinion of the duel mass set up.

[Grumph]

Nope not the normal twin balance shaft setup, it has a centrifugal clutch which locks up a low revs and adds a extra mass to the crank. it disengages at 3000rpm so the bike revs easier. when they go bang you can fix them by either taking them off which looses the bottom end torque or you lock them up which means they are slow to rev at higher rpm. see http://contemplativemotorcycling.blogspot.co.nz/2009/10/in-praise-of-gr650.html for some one else's opinion of the duel mass set up.

It is the normal twin balance shaft, but there may indeed be an extra flywheel. Can't identify it on a parts fische though.Was it on all versions ?
If the balance shaft wasn't permanently geared to the crank, you'd have some very expensive noises as rods met balance weights. There's no extra room in there.