Honda Spree and Elite 50 Forums

Baka, what would it take for me to do a 51mm watercooled setup on the af18e block? Is it possible to deck the base of the bore and top of the bore in order to run the stock crank or do I need atleast a mini stroker then deck then dech the top of the crank? Any info would be greatly appreciated as this I would love my bike to be a very mild water cooled setup that I know is reliable.

there is a prodigy 48mm watercooled bore for stock stroke. moped plus in hawaii sells that kit. you will need an electric water pump and radiator which will run you another $170

so the 48mm i can run on a stock stroke.. what size radiator and pump should i look for?

lilredspree wrote:so the 48mm i can run on a stock stroke.. what size radiator and pump should i look for?

the pump you can use from an car. its the auxilary pump. mercedes,audi's alot of cars have them. its a bosch one. the radiator you can use it from a motorcycle or the larger watercooled scooters.

would this be something quite reliable? any sort of mods to the bore to make it more reliable i should know before i actually get one?

http://www.mopedsplus.net/index.php?dis ... t_id=29841


that the kit you speak of?

its easier to control the temp but its not any more reliable than an aircooled bore. to me its more of a hassle to put together due to the water lines you have to run and figure where your going to mount the radiator and water pump.then pressure the system up to get the water to flow which takes hours to do.you cant add head gaskets like a aircooled bore to lower the compression so your stuck there using race gas so you dont blow a hole in the piston.thats why I took my watercooled setup off my street scooter. was costing to much to ride due to having to run race gas so it doesn't knock and blow up.

lilredspree wrote:http://www.mopedsplus.net/index.php?dis ... t_id=29841


that the kit you speak of?

yup!! for that price plus shipping you can get 2 aircooled bores

did you cut the boost port on the case to size of the 50mm bore?

alright. thanks for the input. basically not fully worth my time and money. great concept though. will keep it in the back of my head. watercooled spree would be awesome. what bore would you recommend where I can still use the stock crank?

and yes I did boost port match

find a ruima 48mm,50mm,51mm bore since you cut the boost port.

any advantage to a ruima 51mm vs 50mm?

lilredspree wrote:any advantage to a ruima 51mm vs 50mm?

just more cc'c. i would go with the 48mm bore. that way if you ever seize,you can bore to the next size ,then the next and so one till 51mm

much power difference between the 48mm and 50mm?

lilredspree wrote:much power difference between the 48mm and 50mm?

more toque. going from 74cc to 80cc