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@WFO Speedracer This fits within your title of "I need some knowledgeable opinions on 61x versus 62T -64X cylinders" While @waxhead is thinking about how to organize his thoughts on how to write his treatise on modding the 62t couch engine for freestyle power, here is a little tech article I...

Take your time. I found the Bpipe for the FX-1, I found your head pipe, but for the life of me I am still looking for your 61x exhaust manifold. I bought it, it shows on my orders, I remember receiving it and shelving it, so I have it, I just need to find it !!! So, go ski and when you have...

@waxhead I have a two carb 62t out of a 96 WaveVenture 700. Would you mind either posting a thread or linking to info on how to to port it and to modify the squish. BTW, since I have the waterbox out of the FX-1 now (it is not the source of my jumping up rpm problem) because the water box is...

Kevbo, so is the best low rpm torque set up putting a 61X cylinder on top of a 62T crankcase? And do they just bolt on without any modification necessary? (Assuming that the pistons are the correct size . . .)

Update: I idled the ski on the trailer and sprayed carb cleaner on every joint in the manifold and carb and also on the crankshaft where it exits the crank case and the engine did not increase in rpm. I took the coupler cover off to make sure that I was hitting the crank with the carb cleaner...

^^^ At some point when I am not up to my eyeballs in engine problems and pump rebuilding, I would like to have your input on doing this to my 550sx (I have a spare Yamaha 650 I could put in it). But I am pretty sure that that is a 2008 - 2020 Yamaha round nose Super Jet you are riding there...

Well @JC-SuperJet , I put the stronger battery in, charge it up fully, made sure that the terminals were tight. And rode today and absolutely nothing has changed. It still wants to jerk my arms off. Slow to . . . 3/4 WOT and then when I slow down again it is slow to 3/4 WOT. Absolutely no...

Yes, I wondered if the problem was even the MSD Enhancher itself, but I wanted to run down all potential fuel issues before moving on to electrical. But finding the positive cable terminal loose, maybe 3/16's loose on the battery post, makes me want to test first without touching more. Wow...

Ok, a little bit of wishful thinking here, which I won't be able to test until Monday. When I was removing the battery in preparation to remove the fuel tank to remove and check the integrity of the water box, I was surprised to find that the positive cable on the battery terminal was a little...

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OK, I am mystified. Happy, but mystified. This worked. Pipe wrench on the already destroyed splines (see first photo in this thread) and 1 1/16" wrench on the oem aluminum impeller and standing with one foot on the driveshaft and the other foot on the 1 1/16" wrench and using a ladder to hold...

@Myself Yes it is the original water box. Should I remove the fuel tank and then shake the water box? @WFO Speedracer I put a different known good carb on and the symptoms were the same. I can put the brand new SBN 44 on in two minutes and rule out my adjustments or any wear or obstructions...

@WFO Speedracer What do you think about this approach? I have a brand new, never used SBN 44 which I put on the 550sx. How about I put that on the FX-1 and try it? Won't that rule out any discussion of the carb?

^^^ @kevbo implementing method discussed in post #22 now . . .

Thanks @Roseand, yes I should have said that. I have the service manual and searched and read here and watched youtube videos and have been turning it clockwise to remove which is reverse thread. I just am at the point of frustration and with me my frustration leads to use of a BFH . . .

Hey guys, I have heated the driveshaft to red hot and then iced it. I have also heated the oem aluminum impeller. I have a 1 1/16" or 27mm open end wrench and put the spline end of the driveshaft in the shaft holder in a vise and I STILL CAN'T BREAK THE DRIVE SHAFT LOOSE !!! I have a 36 inch...

Well I found that the fuel tank intake vent air/water separator canister had 1/2" of water in it. So, I drained it and then disconnected the intake vent from the hose to that canister and blew into the vent and it was working fine. But when I took the ski out for a test run today, it acted the...

I don't really know what those are. Are they on the other side of the reeds which I can see from an inspection camera in the intake manifold? If so, I can pull the intake manifold and pull out and examine the reeds both inside and out.

Thanks WFO, probably why I was having problems attaching the cables to the electrodes. It sure seems like a carb problem. like there is no mid-range before near WOT high-range. I guess it could be a carb problem since I was the one that has rebuilt the carbs over the years. But I have never...

1995 FX-1 with Single carb 701, MSD Enhancer, stock oem exhaust. Throttle cable is not hanging up. Runs fine at idle to slow ski-able speed but seems like there is no mid-rpm. Rather, the ski goes from slow but ski-able speed to 3/4 WOT. It runs fine at 3/4 WOT to WOT. There is absolutely...