Go Back   DIY Go Kart Forum > Building Plans And Advice > Go Kart Discussion


Thread Tools Display Modes
Old 03-25-2020, 08:33 PM
plews14 plews14 is offline
Junior Member
Join Date: Mar 2020
Posts: 2
Thanks: 0
Thanked 0 Times in 0 Posts
Default Torque converters

Hi I just bought a torque converter for a Manco 435B and went to install and the small gear does not line up with sprocket. I bought this because jack shaft broke and store said I could use this and eliminate jack-shaft altogether. Needles to say it didn't. Looks like I would have to remove stock brake. Any help appreciated

Reply With Quote
Old 03-25-2020, 09:08 PM
Solomonster212's Avatar
Solomonster212 Solomonster212 is offline
High Compression Member
Join Date: Feb 2020
Location: Hoover, Alabama
Posts: 181
Thanks: 120
Thanked 29 Times in 26 Posts

So what exaclty is the question? Are you trying to make this one line up? Or are you asking for other torque converter suggestions?
I do karting on the side... And cars on the other side... And --- wait, how many sides do I have?
Reply With Quote
Old 03-26-2020, 05:11 AM
itsid's Avatar
itsid itsid is offline
Join Date: Jul 2013
Location: Ruhrpott [Germany]
Posts: 11,049
Thanks: 1,483
Thanked 4,593 Times in 3,467 Posts

the 435B never had a torque converter but a two stage cent clutch reduction...
it's a one wheel drive and TCs on one wheel drives are only a mediocre idea..

Also: the original reduction is 10.5:1
sprockets : 10->35-9->27 (35/10 * 27/9)
or on 2004 models (older) 7.9:1
sprockets : 10->35-12->27
(which had some issues and was fixed 2005 as above)

you could've just bought a new jackshaft
or best:
give them a call and order 10.375" long 5/8"OD threaded ends
that'd be the best idea (and offer the cheapest fix)

Anyhow.. you cannot just install a Torque converter, with that tiny 27T axle sprocket that kart will not move
you only get a 2.7:1 chain ratio...
and even if the TaVkit you got is stuck in lowest gear at all times, it can only add 2.7:1 ratio itself
and you end up with an overall raio of only 7.3:1
(that and the ~25% power loss in the TC itself will render your kart stationary)

Soooo.. two choices:
a) buy a jackshaft and fix what was there (max 35 bucks)
and return the Tavkit for a full refund since you were given VERY bad advise

b) get a different axle sprocket with roundabout 45T instead (minimum 38)
and a new brake system (30 sprocket, 50 brake.. and whatever you paid for the Tavkit)

Jokes about german sausage are the wurst.
Reply With Quote
Old 03-26-2020, 06:26 AM
J.S.@SMS's Avatar
J.S.@SMS J.S.@SMS is offline
Road Hazard
Join Date: Sep 2018
Location: Weeki Wachee Fl.
Posts: 865
Thanks: 72
Thanked 150 Times in 134 Posts

I've looked for a sprocket for one of these. I still haven't found anything other than the originals for a 3/4 axle and 420 chain. At least you have the sprockets, mine came missing the jackshaft entirely (someone tried to run it with 2.7:1 and a centrifugal clutch). I ended up going with a 10->30-9->27 (9:1 ratio) since I couldn't find a 35t sprocket. But I think it needed a bit taller gearing since even with the taller ratio, it's still almost impossible to get going on leaves or loose ground. As soon as the clutch starts to engage, it immediately starts spinning the tire, and you go nowhere. I think a set of knobbies might replace the turf savers in the future, but for now it drifts great turning right, not so much left.
For his personal safety, keep this one away from bicycles.
Reply With Quote
Old 03-26-2020, 08:19 AM
plews14 plews14 is offline
Junior Member
Join Date: Mar 2020
Posts: 2
Thanks: 0
Thanked 0 Times in 0 Posts

Thank You i Will just buy a new jack shaft.
Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

All times are GMT -6. The time now is 06:32 AM.