Suzuki GR650

[rogson]

Here's a picture of my GR650.

The double disc front-end is off a GS650 which improves the braking considerably over the single disc stock set-up.

The only other mod I have done is to open-up the airbox and rejet the carbs which I did in conjunction with changing-over the original worn-out carbs with a set I got off ebay.uk. Gives the bike a bit more midrange and top-end punch.

Otherwise the bike is stock - including paint, seat and pipes/mufflers.

I have also replaced the clutch and the bike is a honey to ride around town now. The extra flywheel mass at low revs means you can chug (or charge) away from the lights without slipping the clutch - in second!

I have never seen another GR on the road.

[tri boy]

Good honest bike you got there rogson.
Bike shop I worked at in Qld in the 80s had one as a loaner/shop hack.
As you could imagine, every ham fisted Aussie/Kiwi thrashed it as hard as they could, and it just kept going.
I used to comute on it for a few months, and from what i recall, it had ample power for that roll, and was comfy. It was a pretty good weekend tourer as well. Enjoy.

[Badjelly]

I have to confess that it looks like a damn fine bike to me. Showing my age!

That flywheel-on-a-clutch thing sounds dodgy. Do they break? Do they make a whirring noise when they engage?

[rogson]

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That flywheel-on-a-clutch thing sounds dodgy. Do they break? Do they make a whirring noise when they engage?

The extra flywheel makes no noise at all, and the transition from engaged to disengaged and back again is seemless. The only evidence it is there is the uncanny "chugging" ability and stall resistance at low revs.

As regards whether they break or not I can only go by what is posted about the bike on the GR owners forum which doesn't indicate they are prone to breaking or giving any other problems for that matter.

[Motu]

Good to see you finally got one,I was intrigued when you told me about them,but still haven't seen one in the flesh.Just to prove I researched them,check this one out.

[YellowDog]

Nice one!

Good work.

[Edbear]

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Although, as mentioned in a thread above it is very low geared - 100kph @ 5,000rpm. It could easily pull higher gearing and I have a bigger front sprocket on the way for that..

My '89 GSX-F600 did 5200 at 100, but was redlined at 12000. What's the redline in yours?

Any details on the engine type?

[rogson]

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Any details on the engine type?

Parallel twin - 180 degree crank.
Torque curve is virtually flat from 2500rpm to 6500rpm. Red-lined @ 8500rpm, but there's no point going there - no top-end power.

[Gunmetal]

Gday guys, Im currently converting a GR650 into a cafe racer, I got past the fuel lag and throttle response by eliminating the airbox completly, and going with 2 K&N 3 inch Cone filters.

Since I bought it in excellent nick for $1300, Ive lowered the front 2 Inches, cut the rear end away and fabricated a new arse end for the cafe racer seat, relocated all the electrical gear into a fabricated tray under the seat, moved the battery into a new holder in the seat hump, cut all the pegs and brackets away, and had new mounts fabricated and welded for the Yoshimura rearsets, had a custom 2-1 exhaust made up, removed the old guage cluster and replaced it with an acewell electronic unit and general tidy up of the wiring etc.

Next step is a complete pull down and repaint, might get some work done on the motor, but in general the motor runs well, especially since I have lost almost 30kg of weight etc, will post some photo's soon if you like.

Also while Im here, MSTriumph, get back to work! I can see you sitting in your office looking at these forums!

[nudemetalz]

Very interesting, Gunmetal.
Love to see some pics.

[manurewaboy]

According to www.davidreiss.com.au/Tempted.htm ghanging the rear sprocket from 38 to 36 tooth & 15 to 16 on the front will help Jaffa boy

[Jason2340]

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Suzuki were proud of the GR650..........they published a 20 page brochure on it (I have one). Any other Suzukis (single bike that is) have a 20 page brochure devoted to it?

I have two of the GR650's and am a bit obsessed with them. Have several ad's, brochures, and articles. Where did you get the 20 page brochure mentioned earlier though? Would you scan it and send it to me?