***Tav2 bolt pattern not lining up!!!*** URGENT***

[winchman420]

Now that I have your attention
This is my first post here, and although I'm not building a kart, I am building something that uses pretty much the same parts, a wakeboard winch. I got my Lifan 9hp engine and a tav2 in the mail and I am encountering a problem. NONE of the bolt patterns on the tav will line up with the bolt pattern on the engine. NONE of them. I can move the tav in every position possible, and I only get one hole to line up. I don't know why, because on bmi karts it even says that it will work with lifan engines. Has anyone else had the same problem? And how did you fix it? I'm thinking I will somehow have to drill more holes, if that will even work.
Please, help a friend out!
Any help GREATLY appreciated.

-Andrew

 

[ML-TOYS]

Ok my turn

 

[OzFab]

No need, Mike...

The reason for your issue is that a TAV2 is not designed for a 9hp engine, you need the larger 40 series TC...

A 9hp engine is what we call a "big block", being that the overall engine is larger than the smaller 5-7hp engines, which is what the TAV2 is designed for...

 

[machinist@large]

Ok my turn

No need, Mike...

The reason for your issue is that a TAV2 is not designed for a 9hp engine, you need the larger 40 series TC...

A 9hp engine is what we call a "big block", being that the overall engine is larger than the smaller 5-7hp engines, which is what the TAV2 is designed for...

You're both correct......

 

[winchman420]

No need, Mike...

The reason for your issue is that a TAV2 is not designed for a 9hp engine, you need the larger 40 series TC...

A 9hp engine is what we call a "big block", being that the overall engine is larger than the smaller 5-7hp engines, which is what the TAV2 is designed for...

I know that it was originally designed for engines up to 8hp. However I have seen others use this same tc on 9hp, 11hp, and even 13hp engines with no issues. Keep in mind, this won't be on a kart, so Im not worried about it only being rated for 8hp. If you have ever seen a wakeboard winch, they are only used for short (30 second) runs, unlike a kart. I guess my question is now, how would I go about modifying it to work? I suppose I will have to drill new holes...

 

[OzFab]

Let me ask you this; Have you attempted to fit the driver clutch to the engine shaft yet? Let me know how that turns out...

 

[winchman420]

I don't know what you mean by that. Everything else fits fine besides the backplate which bolt patterns won't line up with the engine bolt pattern. I just put the clutch on for size and it fits fine?

 

[machinist@large]

I don't know what you mean by that. Everything else fits fine besides the backplate which bolt patterns won't line up with the engine bolt pattern.

He's asking if the driver assembly fit's on the engines output shaft. Most of the time, if you have the wrong series, everything doesn't fit. And he's trying to help you figure that out before you start hacking things up, because once you start and then find out that something else major won't work, you're basically SOL across the board.....

 

[OzFab]

Gotta love it when someone asks for advice, advice is offered, only to be told "you're wrong" before saying "I don't know what I'm doing"...

I'm out...

 

[mckutzy]

Ibtl.....

 

[winchman420]

Gotta love it when someone asks for advice, advice is offered, only to be told "you're wrong" before saying "I don't know what I'm doing"...

I'm out...

I took your advice after someone else explained what you meant, because it was unclear to me. I went out to my garage to make sure it fit. It did. What you stated wasn't a problem. ?

 

[machinist@large]

Gotta love it when someone asks for advice, advice is offered, only to be told "you're wrong" before saying "I don't know what I'm doing"...

I'm out...

I took your advice after someone else explained what you meant, because it was unclear to me. I went out to my garage to make sure it fit. It did. What you stated wasn't a problem. ?

Photos of the parts in question would have simplified this thread immensely; as the old saying goes, a picture is worth a thousand word's....

 

[Poboy kartman]

Gotta love it when someone asks for advice, advice is offered, only to be told "you're wrong" before saying "I don't know what I'm doing"...

I'm out...

Let's just hope he's not as obnoxious or redundant after 1506+ posts....

 

[winchman420]

 

[machinist@large]

I wouldn't go there if I were you......

 

[landuse]

Post some pics of the parts. What is the diameter of your output shaft

 

[OzFab]

I took your advice after someone else explained what you meant, because it was unclear to me. I went out to my garage to make sure it fit. It did. What you stated wasn't a problem. ?

That's only part of the problem; you said yourself

I know that it was originally designed for engines up to 8hp.

It's not that it's only designed to handle up to 8hp, a 9hp engine is physically larger so, the hole spacing on the side cover is also larger, therefore, none of the bolt holes on a standard TAV2 will line up...

 

[winchman420]

Well, I just don't understand how people use these on larger engines with no problems, I guess they might have a slightly different model. Anyways, since we have established that the bolt holes don't line up, what options do I have?

 

[afremont]

You could try to return it and get the larger series. I think you can get a 40 series clone on e-bay for about the same price as a 30 series like this one:
http://www.ebay.com/itm/GO-KART-TOR...907?hash=item2a4482db2b&rmvSB=true&rmvSB=true

Or, since you're sure that the drive clutch fits your shaft, you could attempt to redrill the backing plate to line up with your engine holes. I really don't see a lot of other alternatives unless you go to a smaller engine, but I don't think you're wanting that.

 

[ML-TOYS]

Once again post pics of both. Also let us know which Tav2 you purchased. I saw this on ebay which states for 3/4 and 1" shafts so i am curious what you have.

Comet 218353A TAV2 Torq-A-Verter
Replaces centrifugal clutch system and boosts performance
Clutch is asymmetric-type torque converter system with asymmetric
sheave faces, this makes it possible to force the belt to a diameter within
the drive clutch (at high rpm) that exceeds the usual 1:1 drive ratio
TAV2 system can actually attain a .90:1 ratio (10 percent overdrive)
Movable sheave face is 18degrees, stationary sheave is 21/2 degree, for a collective angle of 201/2 degree
For use on 3/4in. or 1in. crankshaft diameter 2- and 4-cycle engines with
a maximum of 8 hp