Hello!
My new to me superjet (2000 roundnose) is a mess. Well, it WAS a mess, I'm totally fixing it!
The engine ran while out of the water but never got the chance to ride it yet.
I opened up the carbs to install new kits to realise that one of the main jet is a 120 and the other is a 130. Both low speed jets are 70.
My SJ manual and most of the online searches I made says that both main jets should be 130 and low speed 70. For some reason, they put a smaller jet in one of the carbs.
The engine going in is completly rebuilt, stock specs with lightened flywheel and MSD, but will have a milled head for a little more compression, should be about 170 Psi.
Here comes the question no.1: Would a milled head require re-jetting (bigger jets) ? Or I should be fine with 130/70 jets?
I've sourced a used Factory B-pipe (with mod chamber), which I am going to be installing later, maybe mid-season or next season (I wanna feel the ski with stock exhaust first, then swap B-pipe later after repainting it).
Here comes question no.2: What jetting should I expect to need with the factory pipe (mod chamber). I've looked trough the factory pipe website and I get 2 contradicting answers:
For the limited pipe, they advise 135 high / 70 low (which I read elsewhere too but didn't seem like a 100% reliable source), and for the mod pipe, they advise 145/120, which is WAYY far from original jets and according to all my searches, limited and mod pipes are somewhat similar for a stock engine. Those specs are supposedy for stock engines with A/M flame arrestors (I got stock).
I just wanted to know opinions before ordering everything I'll need
thanks a lot!
g.b.
My new to me superjet (2000 roundnose) is a mess. Well, it WAS a mess, I'm totally fixing it!
The engine ran while out of the water but never got the chance to ride it yet.
I opened up the carbs to install new kits to realise that one of the main jet is a 120 and the other is a 130. Both low speed jets are 70.
My SJ manual and most of the online searches I made says that both main jets should be 130 and low speed 70. For some reason, they put a smaller jet in one of the carbs.
The engine going in is completly rebuilt, stock specs with lightened flywheel and MSD, but will have a milled head for a little more compression, should be about 170 Psi.
Here comes the question no.1: Would a milled head require re-jetting (bigger jets) ? Or I should be fine with 130/70 jets?
I've sourced a used Factory B-pipe (with mod chamber), which I am going to be installing later, maybe mid-season or next season (I wanna feel the ski with stock exhaust first, then swap B-pipe later after repainting it).
Here comes question no.2: What jetting should I expect to need with the factory pipe (mod chamber). I've looked trough the factory pipe website and I get 2 contradicting answers:
For the limited pipe, they advise 135 high / 70 low (which I read elsewhere too but didn't seem like a 100% reliable source), and for the mod pipe, they advise 145/120, which is WAYY far from original jets and according to all my searches, limited and mod pipes are somewhat similar for a stock engine. Those specs are supposedy for stock engines with A/M flame arrestors (I got stock).
I just wanted to know opinions before ordering everything I'll need
thanks a lot!
g.b.
