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You are so right, a couple of years ago me and a buddy of mine sent a sxr engine to an enginebuilder that was very good at building snowmobile engines. He build our engine like it was a snowmobile engine and it didn't work at all. He had a dyno and the engine produced 127 hp. But it had all that...

I'm not sure what you mean here, is this a hint that I'm a nut or? Because that I already know :-)

I have brand new fuel filters and the pickups are fine, Is there some way to check for air leaks? or should I replace them with new ones?

Yes I know that a new pump won't fix the problem but when/if I found the problem then I will have a better pump :-) I think that I am making progress here atleast now I have my fuel lines correct :-)

I had it in the water tonight and there is no difference in the performance what so ever...but I have a solas magnum pump on the way from ATP I will see if I can get some better punch with that one.

I can't this evening and tomorrow I will work a long shift, but I will try to take it out for a test on friday after work. A ride report will follow when I have it in the water :-)

Haha then I must make the switch :-)

Yes I have them switched, I have an extern fuel pump so I don't have a middle fitting for the pulse line. But is it still the same that the fuel in goes to the lower fitting and the return to the upper?

Yes I think so but I don't remember, I'm going to take a look tomorrow when I am at the garage. If I have them switched then it's a easy fix :-)

Thank you :-) Maybe this is my problem with the lack of power :-)

Now I feel really stupid...but I'm not 100% sure that my fuel lines are run correctly. Is fuel in going on the upper or lower fitting on the carbs? Maybe I have them wrong after all. I have fuel in on the top fitting and fuel out under.

So tonight I have been searching for that restrictor but could not find it so I ended up with a temporary solution, Zip tied the return line and I also removed the cover around the flame arrestors( just to try with out them). Then off to the lake for some testing and it worked much better :-)...

Thanks then I know that my carbs are not to big:-) I looked at some old mails from the enginebuilder and he was 100% sure the jettings was correct. Maybe it will come alive if I put in the restrictor :-) if I find someone who sells them around here.

Now I can't find the restrictor, does somebody know what size it was maybe everybody uses the same size.

No not at the moment, I tried with the one that was supplied with the carbs but no difference. Should I try that one again?

I'm running a wamilton internal fuel fill with pickup and I have a external fuel pump. I'm not near my ski but I will take some pics when I am.

How was your fuel lines when they were wrong?

Thank you but no thanks :-) if it had been a xs1200 maybe :-)

Yes 100% the only thing is that I have no restrictor in the retur line, but I tried with one earlier but no difference.

Yes I've heard that to, hence my questions about changine the porting.