Jethro 2t sniffer
Well-Known OPE Member
- Local time
- 7:05 AM
- User ID
- 8069
- Joined
- Dec 8, 2018
- Messages
- 41
- Reaction score
- 113
- Location
- South Canterbury New zealand

Yes the 395 can rev quite well. Std they are EX 100. I don't know the 288 at all really but I've been told they run well so I assume they are similar too the 395. What I suggested works to get things moving but they are not optimized numbers. I just know from experience that if you are not sure why you are doing something then there is a chance it will go backwards. If you stick to the numbers others have given you or what I just suggested you will be safe and its pretty easy to do. I would not cut the intake down to 80 if I were you just incase you really get the bug and want to go all in with a squish cut etc because then your intake will end up too low. If that is not a possibility then those numbers are fine.
It get's more involved when we start cutting squish bands and then we want to correct the ports which are all too low. Once you need to raise transfers things get more complex.
Nice muffler mod. How does she run?
The old 4000s go OK I have a couple. Quite like em. Good solid reliable saws with a wide fat meaty power. Sort of like a 61 with a few more CCs. They are open port so don't rev but can muscle. I know a guy in the states who fitted a 272 top end to 1 and also a different crank and a 395 top end lol
The 288 isn't as revy as a 395 and believe the exhaust is around the 103 mark. I'd say I'd be happy to not touch the intake at all at this stage. Certainly don't want to wreck the thing
cutting squish bands could be on the radar eventually. Why not I guess
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