GK76A strange RPM Exhaust and SP differences?

[Otaroko]

Hi everyone just picked up a new exhaust today local, after already purchasing a new link pipe and can online a few weeks ago. Its an odd one in that it's a dual exhaust leaving the left and right bank separated. So #1 and #2 are connected in a 2 into 1 style to the can, and likewise for #3 and #4. Anyone else have any info on this exhaust. I would take pictures but I've no suitable camera right now. I just have the pictures the seller posted. And I'll post them whenever I upload them to a hosting site. Unless there is some other way?

Also, the same guy has a spare 400 laying around for spares and I'll be buying parts off it since it has SP forks.
Are SP forks interchangeable with non-SP's? What about the calipers and rotors and their attaching hardware? I couldn't see any sort of TPS or anything different on the carbs, though Im not quite sure what to look for. Would it be worth it to buy the motor and frame as well? It's essentially complete just wont turn over. Just cranks forever.

[lizard821000]

Afaik the forks and running gear are same, just they are adjustable.


Ps, I want some sp forks for my hybrid. They don't come along often. Iv currently got rgv forks with zxr internals and adjustable tops ready to go on. But the gk76 sp forks would be a much easier swop, wanna sell?

[jonhunt85]

as far as i am aware the only real difference is the Gearing in the gear box,

one more road going other more track going,

might be slight things ere there but thats the main diff

[Variablevalves suck]

The non SP is better for the road as the SP first gear is a real pain in town.
There a quite a few differences between the two bikes.
CDI, carbs, TPS, airbox, gearbox, forks, cam timing and think the crank or cams had bigger journals.

[Andy]

The non SP is better for the road as the SP first gear is a real pain in town.
There a quite a few differences between the two bikes.
CDI, carbs, TPS, airbox, gearbox, forks, cam timing and think the crank or cams had bigger journals.

Crank has heavier/bigger journals and longer duration on inlet cam lobes giving more overlap(minimal). A little more torque with the sp crank but it wont spin up as fast as a standard 76 crank without some `tuning` on the rest of the motor.
The only real advantage is on the track IMO with gearbox,any of the other differences are minimal without further work from standard....
Andy