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Yep dryers create massive amounts of humidity

Rust , have the bore honed and checked for straightness and piston to wall clearance , like has already been said wouldn't cause a compression loss , keep looking for stuff like stuck rings etc.

Looking good

I hope it turns out well for you . I had a guy buy a hull from me on a GTI 130 that had bottom damage , he wanted me to do a hull swap with mine, he neglected to tell me he sank the ski , it probably sat with water in it for 6 -8 months , other than doing an a$$load of oil changes it cranked and...

Mine is turned this way on my 300SX because it's the only way it will fit, water intrusion is not a big concern on this one it usually stays dry as a bone inside , I don't even run a bilge pump , I did put in the oversized bilge system off of a TS sitdown in the ski when I built it. That's not...

I know Chris Newmiller still does them , not sure who else still does , Paul @ LPW maybe , he is close to you and he can defiantly bore your cylinders for you .

Cometic used to make them, you might want to check with them.

Cylinders are usually marked like that when someone ports them, you sure the cylinder hasn't been ported ?

I know I have a 701 Venture and a 701 Waverunner XL laying around that will never be fixed, one of them should have one on it .

I pulled my old Goki off my 550 when I sold the engine, I still have it here, those Gokis starters were the bomb.

I can snatch you one off of a Waveventure if you need one.

The difference between a 500 and a 650 in there is amazing , it's like a wild animal with some decent power. I think I have a couple of spare 650 engines here , of course they would need to be taken apart and inspected and they have 30 year old crankshaft seals in them.. Rutland racing is the...

I don't know if you have ever ridden one of these but it's not something you want to go that fast on, even with my meager 650 in mine , bone stock with a Protec pipe and a Skat stainless impeller it will get sideways with you and it will powerslide as long as you hold the throttle open. The...

As I said before a 650 is about the outer limit of what the stock pump can handle , you can put all of the HP in front of that pump that you want but it will never make it to the water. 650 engines are a dime a dozen , actually will work with that pump as long as you don't get stupid and they...

It will probably work but the 61x CDI and 62T CDI are different , A 61X CDI will definatly work with a 6M6 (650) stator

6m6 electronics will work on a 61x but the rev limit is really a bit too low for a 701, you could do the rev limiter mod to the CDI and make it work .

I wouldn't go so fgar as to say get rid of it but I wouldn't put a lot nu money into it either , 550's can become serious money pits.

Yep that was the problem with the 800 , the conversion parts needed to run it were always way too high.

It really depends on how it was done in the first place , does it have a 5mm stroker plate under the cylinder , if so yes you could remove it and check the port timing , it may be close , if there is no stroker plate then there is noting you can do to make it work with a stock stroke crankshaft...

Once everything is modded for the additional stroke, there is no going back , start over and maybe try to part out the DASA 10MM , someone might want the cases and the cylinders for spare parts if nothing else ..