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Over the years I've messed around with different designs on the FX, (along with Wave Hog, aka Carl and SpecialFX, aka JD). After all that, there isn't one "perfect" design or shape. We ride mostly creeks and some surf up here in NJ. The big tubbies help keep the nose from pearling while riding...

Used Factory "B" pipe complete with limited chamber. The chamber has a 'stinger" mod. The manifold has M10 x 1.5 full stainless inserts. Polished (where visible) and port matched, outfitted for dual cooling. The chamber has been repaired/modified as seen in the pics. Some minor pitting on the...

(SOLD) New "B" pipe complete with used limited chamber. The chamber has a Team scream 'stinger" mod. Added to the kit is hardware for the manifold to the cylinder. See parts list sheet. Note: DOES NOT come with stinger end to waterbox hose. The stinger end is larger than a regular factory pipe.

Used, 1-FX-1 chamber with minor scratches & pitting. Scotch-brite finish. It has been repaired, as seen in the pictures. Clean. *Comes with a new 4" blue silicone coupler and new 4" silicone SS clamps (the type with rolled edges). Plus a 4oz tube of gasket joint pipe coupler compound,(not...

I don't think it's a matter of total power, it's more like added low end torque and throttle response because of the overall reduction in intake volume. The stock Yamaha 61X offers spongy response. The huge & heavy cast Wetjet exhaust is supposed to have similar performance advantages as a...

Here's a easy to grasp illustration, don't forget the return line restrictor.

https://www.parktool.com/blog/repair-help/tubular-tire-gluing-sew-up

The FX-1 drive shafts are hard to find (have to be made). I used a 2005 SJ shaft, It's a little longer & easier to get. The mid shafts are also getting tough to get :(

Hmmm.... Well making the ride plate and chines line up somewhat smoothly are definitely a challenge. But, drive line alignment is really important. You are going to have to juggle all the things at once to get it close. Probably start by mounting the pump and driveshaft to the new tunnel piece...

Well, it’s still alive! I ride it all the time. Rebuilt the pump & drive line at least 7-8 times. For power, I’ve had a lame non pv Lamey motor that never got to run right (junk), a 1- baby scream 771cc, 2- Team Scream 865cc, & 1-TS 900cc. Been through a bunch of Different pitch Skat-Trak 144mm...

Here's a shot of the business end... There was lots of changes in progress at this point

It's all way different

Save the $$$.$$. Powder coat is for office furniture. What happened to that finish in the first place? After removing the original coating, either sandblast the headpipe or polish it. Keep it looking clean with a good silicone spray before/after the ride (of course if you ride in the salt, fresh...

For a 61X setup, the best all around intake is from the old Wet Jet (gold motor). Designed by Bob Santos (Westcoast). It has like built in stuffers to help reduce the crankcase volume. It also came fitted with a 46mm carb. But with a 44mm on top, it would be a little easier to tune out those...

You really want to use fresh, sharp sandpaper. Otherwise the worn grit just slides over the surface. The factory must run the turf through a machine like a planer that has a large drum sander instead of blades. Don't be afraid of messing up the finish because the turf will grip better after you...

I used to have yellow turf (it fades quickly) and to bring the original color and texture back, I used a 6" DA with 40 grit on the deck and 80 grit on the top rails. After that I hand sanded the top rails and caps with 80. The finish looked fresh.

Some more info....

I ran a couple sets of V-3 reeds in my SS865 that had epoxied cases and intake runner tracts (Boyesen manifold). After a couple of hours of custom grinding the cages to make them fit, and making a couple of gaskets, I fired it up. The first impression was WOW! These reeds really increase the...

E350, The re-conditioning of the 650 head you have looks good. If you had 0.015" removed (at least) to make it flat again, The o-ring groove should have also been touched up to the proper depth (hope so). If not, the o-ring won't fit properly and interfere with the metal to metal contact as...

Some things I learned about O-rings.... 1- When you use 1211/sealant on a O-ring it turns it into a gasket. 2- When you use grease on a O-ring it is a seal. 3- Use the manufacturers specs for groove/seat design. 4- Quad O-rings (X pattern) work better than round O-rings for dynamic applications.