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Hard Jet Watebox Diagram Question
- Thread starter MPower
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DanSquires
Well-Known Member
I've only ever seen the fittings at the pipe and waterbox tapped for the jets
Kingsspeedshop
Active Member
You tap the brass tee and 90 degree fittings and screw in jets..on the straights you use brass unions and tap one side and screw in jet. Matt Braley probably knows the tap size you need for jets.
Yes that's where I got it. I've been fine screwing the jets into the plastic fittings.
MPower
Active Member
What are your thoughts on the specs Rossier suggest vs the specs in the racing manual? Let's assume stock motor except milled stock head and F/A.
The first diagram is Rossier's kit for hard jetting a stock pipe. You can see there is no stinger fitting there like the Rossier pipe has.
I don't remember the sizes the racing manual suggests and I could not read the pics. I would buy all the jets in both ranges (Niche Cycle on ebay) and do some tests after break in. All you will need is a tach.
A Rossier pipe is a nice improvement in performance without being much of an engine risk. I'll send you a clean one for 325 shipped, just sayin'.
I don't remember the sizes the racing manual suggests and I could not read the pics. I would buy all the jets in both ranges (Niche Cycle on ebay) and do some tests after break in. All you will need is a tach.
A Rossier pipe is a nice improvement in performance without being much of an engine risk. I'll send you a clean one for 325 shipped, just sayin'.
suke
Well-Known Member
Bringing this back up as it appears my WB rave has sh1t the bed. Fortunately Mpower has one I can use to get through this weekend.
This the size jet we need in 115 and 150?
http://www.nichecycle.com/ncs/categ...ets/n100-604-n100-604-main-jet-by-mikuni.html
This the size jet we need in 115 and 150?
http://www.nichecycle.com/ncs/categ...ets/n100-604-n100-604-main-jet-by-mikuni.html
suke
Well-Known Member
Just to keep a single place for all of this. Guess we'll see how it works.
So both of us are largely stock, and by largely stock I mean stock pipe. What we've both struggled with is finding any solid information on the net. I scrounged for hours trying to find any good information for hard jetting a stock ski. I blew up mpower's waterbox rave he had as well. So it seems buying a used 20 yr old part just is out of the question.
So both of us are largely stock, and by largely stock I mean stock pipe. What we've both struggled with is finding any solid information on the net. I scrounged for hours trying to find any good information for hard jetting a stock ski. I blew up mpower's waterbox rave he had as well. So it seems buying a used 20 yr old part just is out of the question.
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Looks like you have everything besides new hose(if you want it) and clamps. As long as the fittings are the right size to be tapped 5mm for the jets it should be smooth sailing. Hopefully you run an inline filter between these and the pump so debris does not clog them and overheat the exhaust.
suke
Well-Known Member
I've read conflicting opinions of the filter/separator. Some folks say they can't handle the flow of the water and will not move enough through. You have one you recommend or seen to work well? Looking at the other ski we modeled this after I think we won't need any additional hose. Hoping the fittings will be the proper size to tap for the jets.
I have heard of cheap ones blowing apart but it's not a common problem. The best ones are the billet versions that 73deisel makes.... https://www.seadooforum.com/showthread.php?82423-Factory-Pipe-Billet-Filters
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