760: Whats up?

[djkorn1]

My brother and I are building a roundnose from scratch. We are considering building a 760 motor. What are the disadvantages and advantages of going 760 instead of 701? Is it a lot more brap? Does anything need to be done to the manifolds to make this setup work? What carbs work well? stockers? What else is involved?

ps... we will be looking for parts shortly, after we are done with the hull.

Thanks for your help in advance... the X rules! :shooter3:

 

[unclehulka13]

I'd recommend doing a 701 big bore. The 760 has higher port timing which makes it ideal for mid-top end. Yes, there will still be some bottom hit, it just wont be as much as the 701-760 big bore. Carbs are your preference. I run single carbs because thats what i like. If you want all the power in the world, get the bigbore 785, dual novis or full specs or oem 44's if you're on a budget and rip it up.

 

[Big Kahuna]

best bet is to big bore a 61x 701 cylinder.......... The port timing is not as good........ I believe TLR had some success with the 760 cylinders.........

 

[MADMAT]

I don't think dual 38's are enough for 760. I think they came with dual 44's, right?

 

[WaveDemon]

i hear alot of people say the same thing about the exhaust port timing, but i can tell you first hand from both my own 760 motor i built myself, and the TLR motors ive ridden that the 760 62t cyl motors hit hard as hell. i have no beef with the 61x big bores, but i like the convenience of running 760cc's on a std bore cylinder.

with the amount of psi we run and a b-pipe, prop, ignition, ..etc.. the bottom end hit on a 62T is more than enough for both freeriding and flatwater.. more than enough for all of us with the exception of maybe a stoyer/bogart/lenzi/lee caliber rider who would really notice the difference.

a solid 62t/62t motor , dual carbed even, has PLENTY of bottom and a really strong MID-TOP power band.. and you're on std bore.. so, ******** goes south, you've got plenty of room for overbores..

does a 61x big bore have more bottom? yes, maybe.

will the difference really matter to 90% of us? i doubt it.

thats my .02.

like djkorn said.. 90% rider, 10% boat.. i agree wholeheartedly.

Ummm, I thought that was supposed to be a secret.:shooter3:

:drillsergeant:
Please diregaurd Edwins previous statements and send all your useless 760 cylinders down here.

 

[Ollie Rastabean]

Yeah, Edwin has been eatin Peyote again!!

Those 760s are junk. We use em for boat anchors down here.

-O

 

[Idok]

Cya's ski (h20style's old ski) runs a single 46 .. maybe its a 48 not sure.. i had a single 48 on my 760 also..

the single 48 is the SHIZ okey:

 

[WaveDemon]

the single 48 is the SHIZ okey:

I wish I could get a real close look at one...

 

[WaveDemon]

dam dude.. i Offered to give you a free 44mm so you could have one made a lloooonnnng time ago!!! :banghead:

the TLR 48mm is a sweet carb.. :biggthumpup:

I know, I am dumb. Now I want to make my own. I've got the 48mm plates, now I need another spare carb and one to get dimensions from.

 

[WaveDemon]

i do have a whore 44mm carb i've been raping and pillaging parts from for a while.. you're welcome to it... send $10 to paypal@edwinrivera.com to cover shipping and its yours..

sweet. done deal.

 

[WaveDemon]

what happened to the TLR 48 i sold to chick (royal flush)? maybe he'd be willing to 'loan' it to you for 'examination' purposes??? PM him..

I did, Idok has it. I was hoping butti was going to bring it to lanier for closer inspection. it didn't work out.

 

[WaveDemon]

it didn't work out because butti didn't make it to lanier.

 

[WaveDemon]

it's not that big of a deal. I've got pics. I think we'll get it worked out.

 

[Ollie Rastabean]

it didn't work out because butti didn't make it to lanier.

Yep, the carb and the kawi pump I have been trying to get my hands on.

I gots a new prop for old Scuffy and it dont fit in the swollen pump that is in there now.

-O

 

[Moondance]

it dont fit in the swollen pump

:bigeyes:

 

[Idok]

damn i love that carb

 

[Moondance]

you dirty birdy

who me?:newangel:

 

[Ollie Rastabean]

ollie, you got a swollen pump? i think i have a kaw750 pump somehwere still..

Thanks Dude.

Idok has a pump for me that I bought in Jan. Just been unable to broker a pickup.

But hold onto it. They way these Kawi pumps work I will be needing it sooner than later.

-O

 

[djkorn1]

Ok... I am going to try to read between the lines here...

Not that much of a difference between a 760 cyllinder and a 701 big bore, except that if you blow your ******** up.. the 760 has extra bores left on it.

What cases do I run with the 760 cyllinder and does it work with 701 pipe and intake manifolds? or do I need a 760 intake manifold and dual 44s...

Thanks in advance. I am a little Yamaha retarded, so if these ?'s are dumb, thats why.

 

[WaveDemon]

Ok... I am going to try to read between the lines here...

Not that much of a difference between a 760 cyllinder and a 701 big bore, except that if you blow your ******** up.. the 760 has extra bores left on it.

What cases do I run with the 760 cyllinder and does it work with 701 pipe and intake manifolds? or do I need a 760 intake manifold and dual 44s...

Thanks in advance. I am a little Yamaha retarded, so if these ?'s are dumb, thats why.

the 760 has different port timing than the 61x 701 with less of a low hit. I personally am running a single carb 61x case (it hits really hard) but most people will tell you use a 62t. Either case will need to be bored to accept the bigger sleaves.

I think the only difference with the 701 pipe is that some of the exhaust manifold bolts are a different diameter so you'll need to put in timecerts. you just use whatever intake manifold goes with the case, nothing special for that cylinder. you can use dual 44 intake but that is true with any 701 case. hope that helps.