Trippy motor on Ebay!
- Thread starter MADMAT
- Start date
- Location
- South Florida
wtf? We have a new record for port numbers.
Big Kahuna
Administrator
- Location
- Tuscaloosa, AL
Looks like Submarine is selling a motor.
That is a weird setup.
That is a weird setup.
Big Kahuna
Administrator
- Location
- Tuscaloosa, AL
Looks like Submarine is selling a motor.
That is a weird setup.
That is a weird setup.
Looks like it was built by someone who knew what they were doing. This is way more hi-tech than anything you see on these forums, especially when you consider that it was most likely built before the 62t case was leagle or available. This kind of ability has for the most part left the sport. Its funny, but when there seems to be a new cool idea today its most likely just a rehashed idea from some old racer, that is why the racers of old aren't overly impressed with some inside secret.
- Location
- South Florida
The TEAM CRAMMIT! motor has arrived
jetski9010
Team RTYD
- Location
- Lancaster PA
wow that is some porting work. 11mm storker with a stock bore is there a reason to stay with the stock 81mm bore was that a rule in the rule book back then or something? Wouldnt this thing shake pretty bad?
the WaTeRhAwK
fryin' up a/m electrics..
- Location
- okc
am I just seeing things, or is there some sort of separation or damage in the sleeve at the transfers?
- Location
- Edmonton, AB
How well did that fuel injection system work?
masterblaster
X-H2
that is the first time Ive seen the intake built onto the cylinder in a ski motor,who ever built it was copying a older style reedless kawi motox engine.they were setup just like that with the long boost port and openings in the bottom aux transfers
am I just seeing things, or is there some sort of separation or damage in the sleeve at the transfers?
Hoooleeee....I see that now. Maybe marker marks from measuring or something?
scottie mac
X-
They used to make reed induction cylinder kits for the old 550s back in the day.
The only reason they did this was because the 61x intake sucks. Another thing racers used to do back in the day was actually cut off the intake of a 61x and weld onto it an intake from a 750 Kawi. Pretty much what the 62t cases were designed from.
When they were set up right, they hit very good. Gary Lamb used to use them on all of his skis and he built a bunch of National and World Title winning skis over the years.
Because an 81mm piston is a lot lighter than a tuna can 86, 87, 88, etc piston. More than one way to skin a cat.
Scottie
Dustin Mustangs
uʍop ǝpıs dn
- Location
- Holland, MI
Because an 81mm piston is a lot lighter than a tuna can 86, 87, 88, etc piston. More than one way to skin a cat.
Scottie
What's the advantage of a light piston if your piston speed goes through the roof on account of the increased stroke? Pick your poison I suppose??
The lighter the piston the quicker the engine revs ie: response or as the unknowing think of it, bottom end. Responce and tourque are two different things. When you get into the 87mm+ piston diameter the weight of the piston goes up significantly. Its a give and take thing, heavier piston/more displacement vs. engine rev. acceleration. Waterhawk, I think your right.
scottie mac
X-
jetski9010
Team RTYD
- Location
- Lancaster PA
I guess that what the long boost port and also two small lower ports are for to get rid of some of that heat. Do you think this is an aftermarket sleeve from back in the day or did he do all the port work and window cutting by hand?
scottie mac
X-
masterblaster
X-H2
They used to make reed induction cylinder kits for the old 550s back in the day.
The only reason they did this was because the 61x intake sucks. Another thing racers used to do back in the day was actually cut off the intake of a 61x and weld onto it an intake from a 750 Kawi. Pretty much what the 62t cases were designed from.
When they were set up right, they hit very good. Gary Lamb used to use them on all of his skis and he built a bunch of National and World Title winning skis over the years.
Because an 81mm piston is a lot lighter than a tuna can 86, 87, 88, etc piston. More than one way to skin a cat.
Scottie
Ive seen a few of the kawi intakes welded up to old 61x setups,but its rare to see the intake on the cylinder in ski motors.talk about frankinsteining it.
My 85.5 r&d pistons are pretty light and she revs quick. I liken it to a big block vs small block,in this case the whole motor is much more heavy but the power capacity is much larger as well.2 strokes might go more along the principle of turbos,a small turbo will spool up fast and hit quick with little lag but produce less power,a big turbo will lag more off bottom but hit hard later in the revs and make way more power,I like street turbos and surf motors...........hit now beiotch I dont need to go fast but i wana get there quick lol
jetski9010
Team RTYD
- Location
- Lancaster PA
So I was thinking about something. Has anything ever been made for transfers roofs to act like a powervalve? They can be steep at low rpm but then the roofs slopes flat at higher rpm's? Just wondering since you brought up old racing tricks?