Dat haalt een ietsie getunede RG met Dent piepkes al...dus deze moet nog wel wat meer kunnen leveren met goeie pijpen en grotere carbs.
Mikuni 2.8mm float valves
Standard disc valves
Mark Dent ign pick up set a max advance.
Mark Dent Expansions
The barrels have had the exh port widened but not raised, the squish has been set (at what I can't remember) and the transfers have had lots of work. All of this was done by Stan Stephens to give a broad torque tune.
Carbs stock 28mm with 220/230 mains.
With gutted stock pipes it made 95bhp. With Nikons it made 95bhp too, but with an 8kg weight saving, better sound and no need to cut, gut and weld the stock pipes (believe me, it's a crappy job to do...).
So, it made 95bhp on Mark's dyno. We swapped the pipes over and ran it up again...
The result was an extra 12bhp at peak. 107bhp. We didn't have time to play with jetting but Mark thought the 220/230 combo wasn't far out. The motor has done ~800 miles since a complete rebuild on 2nd oversize.
Mark reckoned the new pipes should peak at 10,500rpm. They did. The Nikons peaked at 9500rpm, as did the gutted stock pipes. The new pipes lost 2-3bhp between 7-9000rpm after which it kept climbing. Compared to the stock motor setup it doesn't lose anything, making more power everywhere. Mark reckons that with an adjustable saec controller the loss could be got back - the pipes aren't quite in sync with the stock exhaust valve opening/closing. That's next.
I was after a reliable 100bhp from the motor with no losses in the midrange and a good linear torque curve. I have it. Lovely.
I'm really impressed with the new pipes. They sound cracking too. I'll post some pics later"
The Lord of the Links
2 keer gewijzigd. Laatste wijziging op 12/07/11 07:26AM door Teamheronsuzuki.