Hey guys I'm looking at a 90 sj that has a 61x lower/ cases with a 760/64x cylinders and head. Is this a good wholeshot/ freestyle motor setup?? It has a single mikuni 44 on it and protec dry pipe. Aluminum handle pole and protec half head girdle. What's your opinion. The price is right but I want something for wave jumping and low end balls!
61x cases with 64x cylinder and head, is it a good surf/ freeride platform
- Thread starter samurai615
- Start date
thanks man,i talked to the guys at group k and they said for 500 dollars the ski can hit a lot harder with porting work and carb rejet. i am trying to decide on two skis a 99 sj with a full 64x engine that has pipe prop and a bunch of other work, or the 90 sj with the 61x-64x setup. 99 has dual 38s, ignition ,dry pipe, prop intake grate ride plate and some other goodies, its a detuned race ski. the 90 sj is kind of a mystery as far as what it is/ has in it as the guy who owns it wasnt thhe one who built it. from what i can see it has a single 44 sbn car, 61x cases, 64x cylinders and head protec pipe and head girdle, prop is unknown.. theres a price difference of 1200 dollars. should i buld the 90 or the 99?
extreemthrottle
freeride junkie
- Location
- north palm beach
i have the 61x-64x in my blaster. i must say without port work its going to lack alot of bottom end like the 61x cylinder. also depending on the pipe and jetting will also make a big difference. im running a factory pipe and i have dialed it in to where the power comes on a bit quicker. that being said, the motor has to be closer to the mid range rpm before it really comes on. it took some getting used to. i have to say i miss that light switch "hit" that i used to have. group k really does nice work and has the research to back it up if your going to go that route, that would help to make a considerable difference. im actually pulling my topend and sending it out to have the port work done.
me personally, if the 99 was in good shape, and i had the cash, id go that route. by the time you get the porting done, you've purchased the round nose.
best of luck
me personally, if the 99 was in good shape, and i had the cash, id go that route. by the time you get the porting done, you've purchased the round nose.
best of luck
- Location
- Midland, Ontario, Canada
I agree with the above...if you can afford the extra $1200 I would go for the 99 RN. It is a much bettter platform to start with (motor wise) and will have much bettet better punch.
I built a 61X/64X motor myself and even ported it myself. It had very nice power and I was happy with it for a couple of years.
Idok
F1pro
- Location
- Nations oldest muthaF+++kin city
X motors in really any configuratiun rule the surf..
x2 If you will be riding surf, the RN will be much drier without having to do hood mod on the SN.
IMO that is nonsense...
Idok
F1pro
- Location
- Nations oldest muthaF+++kin city
same
extreemthrottle
freeride junkie
- Location
- north palm beach
so i have to know then what kind of porting? how far did you go? did you do any decking or changing of the port timing? what kind of compression?
hope im not threadjacking...lol
I have one of these motors in my FX-1 with a single 48 MM power bomb carb, B pipe, ADA head, and a modified CDI and it RIPS! I had the cylinder, manifold, and head pipe ported professionally. I estimate this motor cost me around the $1500 range including parts and labor and minus the cost of the B pipe.