Super Jet B-Pipe Tread Pich?

munki63

Epoxy is my duct tape
Location
Canada
Im looking for the thread pitch for the 3 bolts that hold the head pipe to the manifold and the 8 that hold the exhaust manifold to the cylinder
thanks
 

Proformance1

Liquid Insanity
Location
New York Crew
You wont find the M10X1.25 at mcmaster in SS, so dont bother, if you are looking to go that way. There are a few guys that sell them. The exh are m8 x 1.25 but with 12mm heads not the standard 13, if you are using a FP
 

munki63

Epoxy is my duct tape
Location
Canada
Ya I found that out, what's the big three on the head pipe tho? Those and the exaust are the only non Allen head bolts I have on my ski now
 

Matt_E

steals hub caps from cars
Site Supporter
Location
at peace
Ya I found that out, what's the big three on the head pipe tho? Those and the exaust are the only non Allen head bolts I have on my ski now

the three on the head pipe: M10x1.25

The eight exhaust manifolds bolts: M8x1.25 for 61X and M10x1.25 for 62T
However, the exhaust manifold bolts are special in that they have smaller hex heads than a standard bolt of that size.
 
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M10 x 1.25 x 40 hex flange bolts for the head pipe, which you can get the same plated bolts FP sends you for 1$ each at a good local industrial hardware shop. ARP, a bolt manufacturer, has them in stainless. I've found them for about 4 or 5$ each, but haven't tried them yet.
 

Proformance1

Liquid Insanity
Location
New York Crew
If I wasnt doning so many skis I would put together new 316 SS bolt kits together for SJ's, I have most of the data and an aewsome supplier, considering we buy a ton of hardware in SS every year. I have the correct length SS allen FP 3 bolt sets, I'm sure i could find 12mm head M8's, but you can just buy them from yamaha for $2 each
 

munki63

Epoxy is my duct tape
Location
Canada
your not gonna be able to put allen head bolts on the exhaust manifold
lol, I know that much, Just wanted to replace everything on my motor, Really would like to do what this guy did
JETSKI015.jpg
 
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