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Has anything been done to the bottom of it , how much weight have you added and where did you put it , what pipe are you running all these are factors also . A worked over 4763 would be a good starting point

Probably the best idea is to set it up with the can muffler and run it that way in 3 classes if you want to , swapping out a can muffler to a tuned pipe is during a race is not all that fun bc I'm sure the needle setting is gonna change a bit

I'm not sure we order from a dental supply company , the stuff we get today is hard as a rock but it is not as hard as it was 20 years ago .

What you are talking about is called die-stone , some pretty tough stuff when mixed with water

i will take the lower bill

all that discoloration is fuel getting between the sleeve and block and heat cycles

dont underestimate a k&b with a can muffler on a shaman

Brad im also interested in one those powerheads with a rg piston n sleeve in it 

dont think so kris , the 1.04:1 & the 1.19:1 are the only ones i know of 

cant remember who got ahold to them but they changed the last bit of the outside sponsons and it was called a Raptor 

Rod , what gear ratio did you go with ? also i believe 9/32 brass tubing will fit where the teflon liner goes , the pin that holds the drive dog on needs to be replaced  as they are pretty weak 

thats a good idea Rod , i know kris flynn was having some made at one time  

Carl as far as the big boats it a 18ft critchfield modvp 

ha ha yeah right , ive been out there testing mine when it was around 50° or so 

cause these big boats cost a lot more money to run 

Carl you and Talley going to Sowega in February? I'm trying to  talk Kevin into going 

how much shipped to 29501 

Carl  the early cranks were small they were 12mm the later ones are 13mm just like the OS takes the same bearings . I got a small crank one that will out mph the bigger crank same boat same prop

chris the bx-r is the buggy motor tt made that are no longer available you should be able to convert any pull start buggy motor to fit on the tt lower , good luck finding a new tt pro outboard piston and sleeve. ask on here or on Facebook somebody might have some laying around not many people...