- Location
- North Jersey
Will the 61x cylinder fit the bottom of a 760 with modifications
760 bottom end with 61x top end
- Thread starter dirtyjrzy
- Start date
WFO Speedracer
A lifetime ban is like a lifetime warranty !
- Location
- Alabama
Yep I have done quite a few of them on sitdown watercraft where they cracked the 760 sleeves and didn't want the expense of repairing the 760 top end . Truefully on a sitdown there really wasn't any significant decrease in power , and they ran just fine with the 760 jetting.
- Location
- North Jersey
What kind of riding do you do? Stock for stock 61x ignition is better but you can add a zeel to either for great results.
You're showing dual carbs with a 61x cylinder. What cases are on that? If you already have 62t cases there's no point in swapping cylinders.
You're showing dual carbs with a 61x cylinder. What cases are on that? If you already have 62t cases there's no point in swapping cylinders.
E350
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- Location
- Sacramento Delta
@Roseand are you saying that the stock dual SBN 38 62t engine in my 1996 WaveVenture will make the same or more bottom end as the stock single SBN 44 61x in my 1995 FX-1?
I always thought that I had to put a 61x top on it. But should I just swap it as is?
WFO Speedracer
A lifetime ban is like a lifetime warranty !
- Location
- Alabama
The 760 will make more power but due to the porting it is better for top end power, the 61x cylinder will have more bottom end power, it totally depends on what you are after and what you are wanting the ski to do.
On another note how Roseand and can tell whether those are 38's or 44's with the flame arrestors still on them is beyond me, am I missing something ?
On another note how Roseand and can tell whether those are 38's or 44's with the flame arrestors still on them is beyond me, am I missing something ?
I never said which carbs they were?
Stock for stock, 61x cylinder will make more bottom end than a 62t cylinder due to the porting.
If you want playful throttle response with little to no mods i recommend 61x cylinder.
But if you raise the comp and add some timing into it you can get pretty good response out of 62t and 64x cylinders
E350
Site Supporter
- Location
- Sacramento Delta
@dirtyjrzy This will all come full circle and provide useful info to you and to others.
@Roseand Ok, then to obtain bottom end freeride/~freestyle performance, should I / can I put a 61x cylinder on top of that 62t engine that I already have? What is involved? Can I just use the 62t pistons in the 61x cylinders?
And if there is already a thread on this, please point me if you know it.
@Roseand Ok, then to obtain bottom end freeride/~freestyle performance, should I / can I put a 61x cylinder on top of that 62t engine that I already have? What is involved? Can I just use the 62t pistons in the 61x cylinders?
And if there is already a thread on this, please point me if you know it.
holygoat
Site Supporter
- Location
- Indiana, USA
Just a few... just google 61x/62t and do some reading.
If you want to use the 62t pistons in your 61x cyl, consult a reputable engine builder and have them build you an engine. Generally pistons and cyl are matched at assembly to ensure correct clearances. I would likely not just throw different pistons into an unmatched bore.
- Location
- North Jersey
This is a full 760 62t motor I’m running dual 44’s with 180 psi each cylinder with a factory B pipe on it 84 mm pistons with a Riva racing solid dome head. I’m running stock 760 electronics.
My unpopular opinion is that the 62t is better than the 61x for all things in all ways unless you pay somebody to port the 61x and the 760 is a step up from that. Home job port a 760 with the yamanube template add ada head and Zeel and you'll have an inexpensive motor that is very hard to beat. All you need is a Zeel. You could run a touch more compression but it won't be a huge difference. If I had what you have I'd add a Zeel and spend my time and money on tuning.
WFO Speedracer
A lifetime ban is like a lifetime warranty !
- Location
- Alabama
Sorry maybe I confused your post with one of E350's many questions and ruminations . honestly some of it kinda throws me off at times, if so please accept my apologies .
Bottom end power is really a myth , a 701 61x motor quite simply put gets into it's usable powerband quicker than a stock 760 does , add compression, a b-pipe and some ignition timing to the 760 and it's a different animal altogether.
I wouldn't give up CC's on an engine that I already had , that is for sure, the (there is no replacement for displacement ) rule still applies here.
When I did it on sitdowns it was because at that time 62T cylinder could be had for nearly nothing , I can remember buying them for $25.00 - $50.00 years ago still at std bore size sometimes ready to run with the pistons , in my case it was a very cheap fix for even cheaper customers .
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It will bolt on. Expect throttle response to be better and power to be lower.
Dual pulse lines if you zoom in
- Location
- North Jersey
There 44”s jetted for the b-pipe
bored&stroked
Urban redneck
- Location
- AZ
That's basically the setup every oem dual carb superjet has ever ran besides carb size.
WFO Speedracer
A lifetime ban is like a lifetime warranty !
- Location
- Alabama
A combo I run across quite frequently is a 61X bottom end with a 62T top end on it , what that means is someone yanked the 62T engine , put the 61x cylinder on it and cobbled what was left back together and sold the ski, they actually run quite well like that though and in a sitdown ski you would barely know the difference.