Bodis or Yoshi full exhaust system

[Markys]

Jack up kit negatively affects the stability in higher speed (above 150 kmh). This disanvantage displayes also during hard acceleration above speed 150 kmh. But I can live with it. I can compare since I have noticed the change in bahaviour just after installation of kit.  The kit helped to quick response of the steering much. You are sitting more above the handlebars, you can feel the front wheel and this is more convenient for sport rides when you are enjoying the turns.

The cons is different position of axis: front-rear sprockets and position of swingarm with result of grinding of rubber buffer / chain touch defense by chain ... I had to due this cons change my sprockets 17/41 for 18/43  in order to extend the diameter of chain-sprocket set. The second cosmetic one is that I cannot use center stand on flat surface.

My sag measured as difference between total releasement of shock and compression with rider onboard is front / rear: 4,5 mm / 30 mm.
Rear shock seems to be OK.
Front forks are very stiff and bouncy. I will try to play with "compression damping" and "rebound damper" adjusters. Try to soften them.

[KoZi]

My sag measured as difference between total releasement of shock and compression with rider onboard is front / rear: 4,5 mm / 30 mm.
Rear shock seems to be OK.
Front forks are very stiff and bouncy. I will try to play with "compression damping" and "rebound damper" adjusters. Try to soften them.

4,5 mm? this can't have a place...

You have to hange your SAG and correct rebound/damping.
Rear 30mm for street use is little to stiff...

For first try to take a balance of motorcycle and set the same SAG's front and rear. Then you have a point to modyficate suspension for your own style of riding. But for a lot of people 35-45 front and rear is good for day by day use. Ofcourse you have also set rebound and compression. Remember - we don't want a "pogo" situation and very important is free sag on rear shock.

Good luck.

[Markys]

Sorry for type error. Not 4,5 mm but 45 mm of course.
I have tested the top speed after installation of full race Bodys exhaust system (previous equipment was serial OEM manifolds +Yoshi dual oval). Top speed is not important on gsx but it is good parameter for comparison of improvement.
I was on about 225 kmh with serial manifolds and now I am on 235 kmh. Bike runs with gear ratio of 18/43 while speedometer is corrected by speedohealer to real speed (adjusted 12,3% as per GPS measured data).
Seems as good improvement. I am looking forward for result of planed re-mapping. 

[seth]

What's the access like to the oil filter with the bodis downpipes ?
A picture would be great if you could .

[Markys]

The access to oil filter is plus minus the same as by original.  There is space up to 80 mm between second and third pipe. I can easily insert my hand to oil filter position so it seems than I will able to remove the filter with pipes put on.

[Markys]

Sooo I have finished the tuning on dyno.
Below two graphs for comparision.

dyno with previous config: mapped PC111+air filter Pipercross+OEM headers+yoshi dual oval + OEM camshafts - 103HP / 130Nm
dyno with my new config: mapped PC111+air filter Pipercross+full Bodis system + OEM camshafts - 128HP/138Nm

The bike is much quicker in acceleration and it is funny now to rev up the engine up to 8.000 rpms.

[grog]

Mate, that is a brilliant result. Lots of power for stock cams.

[Markys]

of course, the numbers are on the engine (bhp) not the numbers on the wheel (rwhp).
Impressive is the difference which I can feel now in all acceleration modes. 
Maybe it helps somebody to make a choice and install any race exhaust manifolds. 

[KoZi]

This is very good resoult on stock cams