Engine specs

[907 RIDER]

I am looking to find the specs on the jug and head, specifically the bolt spacing that bolts them on. I have a crazy idea of the possibility of using another jug and head off a Honda 250r air cooled 84 three wheeler. I am thinking if by chance the bolt pattern was the same I could use it with the Honda piston and possibly a custom crank. I have a R that has a broken case so I figure I might be able to use something off it and make the 98 Blaster I have faster. I am also planning to look at the rear hydro brake system and rear shock on it B-)

 

[FLOTEK]

that is a crazy idea ..thats unfortunatly not going to work to well

 

[907 RIDER]

I agree you are probably right, but can you tell me why it wont work ? Do you have specs on the jug/head ?

 

[907 RIDER]

Anyone else wanna chime in ? What is the major stumbling block with this working ? Is it as I suspect and the jug bolt spread or something else ? I have found that the Blaster has a bore and stroke of 66 x 57 and the R has a bore and stroke of 70 x 64.4

 

[FLOTEK]

if it bolted up which im almost positive it wouldnt the n for the ports to line up at tdc and bdc and have a correct squish clearance you would need a custom crank and also custom piston ,the aftermaket crank would need ot fit in the yamaha blaster cases wit ha +7mm stroke(and wont fit even in trenched cases) so thats 400$ for one ot be made right there then theres a modifed cut 70mm piston that can account for the longer rod and equate to the right deck height probably another 200 bucks there the nthe custom cut gasket and possibly a head rechambering all to have an ancient 1984 port design layout that wont even make as much hp as a simple big bore 72mm blaster kit can make ...trust me the old hondas are poor at best a vito jug is actually a big improvment over the old air cooled hondas

 

[907 RIDER]

Ok thanks for letting me pick your brain, I knew somebody had the knowledge to dispell the crazy thought from my head. Looks like Vitos is the only big bore kit for these rides>?

 

[blasterboy91]

no...but they arnt the best either

 

[907 RIDER]

no...but they arnt the best either

SO what other options are there? who has a better kit for sale on the market ?

 

[chris960]

The best out there is the L.A. sleeve sonic 240 then Airsal phantom 240,then vito's 12 port 240, then L.A. sleeve's 240 sleeve kit in a stock cylinder. But they all need some porting to reach their full potenial.

 

[quam]

yup seems like the general consensus is that the port and polish job is the single most important mod to be had.