Engine difference – 3TB vs 4PT (missing 5 HP)
The 3TB model is supposed to be 33KW, but the newer 4PT is 29,4KW. Has it really 3,6KW less or is Yamaha just using different numbers for some reason? Anyone know??
FYI:
I have the 4PT model. For testing purposes I did take out the airbox snorkel and the muffler tip (I would not run the bike like that though, too noisy) .
Now the bike was more noisy but to my surprise I could not feel any power difference. The bike did not feel lean. Most bikes with heavily restricted intake/exhaust respond quite a lot to even modest “decorking”.
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Yamaha XT600E '01, Honda XR400 '03, Yamaha XT550 '83
Last edited by G600; 9 Sep 2013 at 00:30.
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