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55mph is that a typo. A 900 with all the bolt ons doing 55mph my 8mm stroker did 64 on the gps in my 2008 superjet.

Close the top adjuster a little

I dont have any pics sorry. I just used a hole saw on the inside, Im not sure why you would bother going aftermarket when you can just cut a hole but the option is there

I have built a few expansion chambers for other things in my time. I know the result of to small a stinger it keeps the heat on the piston. By having a restrictive water box you decrease the pressure drop across the stinger, It was not until i did it then I read the bit by yamaha to say they had...

Took me a few pistons to figure it out my self

2008 and above have a more restrictive water box if you have not moddified the water box the pressure drop across your stinger is not enough and you will deto your pistons. You need to cut the water box open and use a hole saw on it

The theory is sound the practicabilty is not so easy.

No its fine. I would have gone to a bigger low speed but put them on and see how it goes

The extra timing always makes them go lean down low the upside is you can put in more fuel which makes more torque. win win

Yup put more fuel in down low. It will smooth it out a bit but will also make it crack harder on the throttle

Lol MIke I was hoping it was goign to be a b1100 again cause I was going to sell my 760 rickter just needing a hull Sounds like a good setup you have there

Any updates how did it go. Keen to see I may buy one of these if it goes well

Tom Hanks port job

I would doubt its the head they do wear out in time like all heads do but I cant imagine it id that just yet. The way you have described the cylinder makes it sound like you have an issue with a non flat deck. personally I would getting the cylinder skimmed

Have a look at the true performance cylinder. I believe this will be the mile stone every other cylinder will be judged by when they get out there

email sent

I have to suscribe to this just to see the replies. With a title like that what could go wrong

Its most likley you sleeve has dropped this exposes the o-ring to the flame front. Is it always blowing the in the same spot ??

You don't have enough in the mid range there is alot more throttle response in your engine by ramping that up, I can make a better curve for you if you like. Its just ignitech software I have that on my pc already

I'm only going on what jet manic posted so don't shoot the messenger. I have no reason to believe jet manic would lie, you on the other hand , but your right it's not about the hx3. I was simply posting a history about programable 61x / 62t igntions with known faluires