El lobo

#41
So as I wait for metal to raise the motor I've got gearing questions I've got a 10t in front and a 54t rear with 41 chain 13 inch tires target rpm is around 5000 does anyone have any experience on tav gearing to tell me if I'm in the ballpark? Or should I try different gearing?
Its going to wheelie! LOL

30 series TAV-2 with 6" Driven pulley have 0.90:1 overdrive.
54:10 w/ over drive is 4.86:1
13" Tires should have a circumfrence of ~3.4 ft.

5000 RPM = 40 mph.

I'm putting a Hemi on a 6" El Lobo (54T sprocket) with a 30 series TAV-2 as well. Just finished the engine. Now about to order the TC and Minibike.

I plan on gearing so 7500 RPM is 65mph which is the 54T and an 11T. The 10T should be a good sprocket for you to use (40mph at 5k RPM). With the TC, you could probably use anything from an 8T to a 12T sprocket, depending on how fast you want to go or how much torque you want.

With the 6" Driven, you get 2.68:1 Reduction at engagement. So 54:10 is 5.4 x 2.68 = 14.5:1.
So you get a range of 14.5 : 1 at engagement to 4.86 : 1 in overdrive. It is a decent range for 13" tires.

I put this together, today actually, for a minibike with 13" Tires, 54t rear sprocket and 30 series TAV-2 with 6" driven. Only I picked 5k cause that is closer to peak torque for me (guessing), not cause it is max RPM.

6" Options....

54 : 11 = 4.90:1, 4.42 :1 with 6" pulley, 65mph at 7500 RPM. 43mph at 5k
54 : 10= 5.40 :1, 4.86 :1 with 6" pulley, 60mph at 7500 RPM. 40mph at 5k
54 : 9 = 6.00 : 1, 5.40 :1 with 6" pulley, 54mph at 7500 RPM. 36mph at 5k
54 : 8 = 6.75 : 1, 6.08 :1 with 6" pulley, 48mph at 7500 RPM. 32mph at 5k
 
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Davis

Well-Known Member
#42
Its going to wheelie! LOL

30 series TAV-2 with 6" Driven pulley have 0.90:1 overdrive.
54:10 w/ over drive is 4.86:1
13" Tires should have a circumfrence of ~3.4 ft.

5000 RPM = 40 mph.

I'm putting a Hemi on a 6" El Lobo (54T sprocket) with a 30 series TAV-2 as well. Just finished the engine. Now about to order the TC and Minibike.

I plan on gearing so 7500 RPM is 65mph which is the 54T and an 11T. The 10T should be a good sprocket for you to use (40mph at 5k RPM). With the TC, you could probably use anything from an 8T to a 12T sprocket, depending on how fast you want to go or how much torque you want.

With the 6" Driven, you get 2.68:1 Reduction at engagement. So 54:10 is 5.4 x 2.68 = 14.5:1.
So you get a range of 14.5 : 1 at engagement to 4.86 : 1 in overdrive. It is a decent range for 13" tires.

I put this together, today actually, for a minibike with 13" Tires, 54t rear sprocket and 30 series TAV-2 with 6" driven. Only I picked 5k cause that is closer to peak torque for me (guessing), not cause it is max RPM.

6" Options....

54 : 11 = 4.90:1, 4.42 :1 with 6" pulley, 65mph at 7500 RPM. 43mph at 5k
54 : 10= 5.40 :1, 4.86 :1 with 6" pulley, 60mph at 7500 RPM. 40mph at 5k
54 : 9 = 6.00 : 1, 5.40 :1 with 6" pulley, 54mph at 7500 RPM. 36mph at 5k
54 : 8 = 6.75 : 1, 6.08 :1 with 6" pulley, 48mph at 7500 RPM. 32mph at 5k
Thanks for the break down I think I'm gonna run it with what I've got now as 40mph sounds plenty fast for this bike. And wow you wanna take yours up to 60 that's hauling butt.
 

Davis

Well-Known Member
#43
I got the bike together today and rode it around to check for kinks and all seems good so far these tavs take of like a bat outta hell I already went over backwards but in all I went well I would recommend a tav on these bikes. The only thing I don't like about this kit is the bolt on footpegs they slip easily I had to tighten the crap outta them just to get them to hold.
 
#44
I told you it was going to wheelie. LOL

What did you end up using to raise the engine? I'm thinking about a 2" x 5" x 7" piece of Aluminium. It's like $30 shipped. It is what I used on my last minibike.

I'm also considering the 7" pulley. Does the pulley need clearance or just the backplate for the TC. Would 2" give me clearance for the backplate and the 7" pulley???
 

Davis

Well-Known Member
#45
I told you it was going to wheelie. LOL

What did you end up using to raise the engine? I'm thinking about a 2" x 5" x 7" piece of Aluminium. It's like $30 shipped. It is what I used on my last minibike.

I'm also considering the 7" pulley. Does the pulley need clearance or just the backplate for the TC. Would 2" give me clearance for the backplate and the 7" pulley???
I used 1-1/2 aluminum square bar and it clears good but may be tight with 7inch pulley but a 2inch would clear easy only down side would be the gas cap. This thing is a troubleshooting nightmare the primary clutch weight rod broke loose and locked the clutch so I tacked both ends and then the disk brake bolts came loose and locked up the rear tire and the secondary bolt worked off and caused a ton of noise. But it's all part of the fight I'm good now for a minute and you was dead on on mph I'm right at 40-41mph. Oh ya and the neck bearings are very sloppy I had to replace them and the belt is stupid tight that came with the kit and has already killed two brass bushings so in all I'd probably just buy the comet kit and avoid all of this as not many people can deal with this in house.
 
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#46
Maybe I missed something in this thread, But I am also building an El Tiger. 6" wheels, OldMiniBikes's "Ultimate performance" hemi kit, Comet TAV2 30. My question is what are you guys using for brakes? I have the sprocket drum and it sucks! Especially on such quick bike. Any advice on brakes while running a Torque Converter would be awesome!
 

Davis

Well-Known Member
#47
Maybe I missed something in this thread, But I am also building an El Tiger. 6" wheels, OldMiniBikes's "Ultimate performance" hemi kit, Comet TAV2 30. My question is what are you guys using for brakes? I have the sprocket drum and it sucks! Especially on such quick bike. Any advice on brakes while running a Torque Converter would be awesome!
Mine had the disk brake kit on it from the manufacturer. 8A2909FA-A04B-4B98-97C9-0A231677DE3D.jpeg
 

Davis

Well-Known Member
#49
That's awesome Bud, I didn't think of that upgrade when I got the bike. Im going to try and put my pegs where yours are too. I have mine in front of the engine plate and there is just no room. Is that a mechanical disc brake or hydraulic?
Hydraulic it works very well. Just be sure to get it set correctly and use locktight and your good to go.
 
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