my new creation

[racingelvis]

over a year ago I decided to retire my 650 tohatsu race engine. it was a hard descion to make, but the rarity of the motor made it a little easier to do. so I decided to build a 3 cylinder wide base rs 650 kohler race engine. after investigating this thoroughly, it remains a confusion if kohler actually ever built a 3 cylinder wide base. I talked to some very very knowledgeable kohler guru's!!! some say they built around 10 wide base 3 cylinders and other say not!! after looking for this engine with no luck I decided to build my own. I took 2 75 rs kohler cases, cut them in half and made a 3 cylinder wide base case. I then had northern crank make the crank and line bore the case. I had the cylinders bored and ported the cylinders my self. I had jay sperry build the ignition for it and all I can say is this thing is so stupid fast!!!. it is way faster than my tohatsu ever was. only one problem though, getting the chassis to work with this much power, I had a huge amount of problem's with the other race sled's at the beginning of the season that I never spent allot of time trying to make this sled work properly. it was a testing ground for this any ways for my first year out with it and i am excited to say it works and works very well. the fastest speed recoreded this season with it was 94 m.p.h.. here are a few pics,........

















I also built this one, lol,..... a 440 triple wide base with reed cages. I did not run this motor at the track this year, next we will give it a try

[Deleted]

that's some bad azz stuff!!

[magnesium]

Don't be so hard on the old Tohatsu,Bill. Rupp built ten of them,for sure. You won a lot of hardware with it.

[racingelvis]

thanks guys, mark I loved my 650 tohatsu, it was a real screamer. in a 3 year span out of 24 races I won 18 times with it, and 2 3rd place finishes in the world champion ship. all on a mid mounted engine chassis. but it was time to retire it sadly. I will restore that race sled one day, and it will go down as one of my best sleds ever!! this new beast I built after I get the chassis worked out it will be a handful to drive but I am looking forward to it very much.......b.s. 171

[red19lite]

bill I don't see how you get to the end of anything with all these different moves this season, did you run the reeds this year? looks badass, I would put a billet piece the same thickness as your spacers between engine and motor plate to give that welded crankcase more support Attachment Deleted

[kronnikracing]

Bill that is just cool! Cant wait to see those 2 on the track next season.

[Hoots]

Very nice Bill! Those wide base rs can make some serious power. Would love to have a triple just like it but don't think my pocket book could handle it LOL. Soooo, do you pull the motor to work on the primary?

[Ruppsforever]

I think he just drills out the pop rivets and removes the whole panel.