Recent content by Dan Rudd

My son has a 89 550 which he picked up as a poor running project. We did a top and bottom rebuild on the motor and just put on a new 44 SBN. The add on's are OP head, Coffman half pipe, West Coast waterbox, OP intake and the 44 SBN I mentioned. The compression is an equal 150 lbs. Let me say...

D-Roc, Were your 550's stock or had you done much to them? I wonder how that effects jetting. I'd be good with a used carb (would sure like the price difference!) if I could find one I felf I could trust. Thanks, Dan

The OP manifold is angled and doesn't require a spacer. I'm reluctant to buy a used carb because I don't want to run the risk of buying someone elses troubles. I hoped that if I bought something new it would be one less this to worry about. My issue is that with the mods to my sons ski I'm not...

I had posted this in the 550 section without any replies. We were hoping to order our SBN right away and were hoping to have a better understanding of what we need before we order it. We're looking at adding a Mikuni SBN to our 89 JS550 which currently has the BN. We just can't get that BN to...

We're looking at adding a Mikuni SBN to our 89 JS550 which currently has the BN. We just can't get that BN to tune no matter how much we tinker with it and we want some more reliability. The motor has a fresh complete rebuild. The ski has the following mods. Ocean Pro head Ocean Pro intake...

Tell me about this intake spacer. His BN has a spacer between the carb and manifold which is about 1/4" thick. Is this what you're refering to? Thanks, Dan

Hey guys, thanks for the info. It seems everywhere I ask, I get the same answer....dump the BN and go with the SBN. Man, we were tuning on that thing all afternoon and just couldn't get it dialed in. We're pretty comfortable with carbs and carb tuning since my son races karts and has to tune his...

I had previously posted this in the 550 area but got no response and very few views. I'm hoping someone in the General area can guide me a bit. Thanks, My son saved up his money and bought a real nice 86 550. The motor had been previously built up. It has a Ocean Pro head (my previous post I...

My son saved up his money and bought a real nice 86 550. The motor had been previously built up. It has a Westcoast head, Coffman half pipe, Westcoast waterbox, aftermarket intake (unknown brand), as well as all the handling goodies (plate, grate, etc etc...). The carb is a BN44 We just had the...

We just picked up the ski from the engine rebuilder yesterday and were heading north in a few hours. As we were re-assembling this morning we find that were missing the exhaust gasket for the "U" shaped exhaust pipe which runs from the manifold to the upper pipe. I contacted the builder and he...

Hey Kevbo, I don't entirely follow your instructions to set at "rich of peak". Are you saying to set the low needle to it's peak idle and then just a bit richer? Thanks, Dan

My new blue keihin arrived today. My son called me at work to say the box arrived and is chomping at the bit to get it together and in the water. 2XLR8, The damage that was done was to the needle. I thnk it was over tightened and the seat was trashed. Can anyone out there give me a good...

Thanks Kevbo, I've seen a few CDKII carbs online but never knew if there were any differences. So I take it I have a 38? Would there be big advantages to go to a Mikuni SBN? Thanks, Dan

After a complete rebuild (including new needles) the carb on our 95 750sx just won't tune. I think the L needle seat may have been damaged during the rebuild which may account for the inability to get it to run properly. I'm leaning toward scrapping the original carb and replacing it with...