Mon, 26 Apr 1999 11:42:33 +0200 - Message No. 5494
From: martin.franz@netway.at

Subject: Tuning, tuning, tuning...


Hi friends,
since friday, I'm owner of the new sinus tuning kit for africa twin. Short 
report: kit comes complete with airbox modification, different air filter 
(k&n, but not the one for africa !), mounting equipment for this airfilter, 
carburator (adjustable) needles, main jets and springs, conical exhaust 
piping, muffler out of stainless steel (also inside), alu mounting for 
muffler.
Power gain meassured on dynamometer is constant 5hp from 6.000 to 8.250rpm; 
alos gain in low rpm, about 4hp at 2.000, but a "no gain" zone at 4.300.
Noise: no db increase measured on dynamometer run compared to orig. 
mufflet. Knobby tires made biggest noise...  personal impresion is, that it 
is a bit louder, but not much. VERY far away from an open muffler 
(McBruell, etc.).
Sound is deep and sporty. Some zwizwizwi at very high rpm and full 
throttle, have to verify that again...
Driving: not only power increased, but also reaction to throttle. Absolut 
no negativ load shift reactions. Bike feels like it has eaten steroids 
(uhh, maybe bad for Jolanda :-))

Negative: no heat shild, makes sometimes "BANG" (have to check my valve 
clearance, might be also the cause).

Conclusion: for a final result I of course need more testing (fuel 
consumption, performance on altitude, final sound check, offroad...), but 
today, I'm absolutly happy with that system !

best regards, Martin



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