Cheap Chinese TC? / A lesson in rushing purchases.

[Thepartsguy]

They are about $55 shipped to my door in PA in three days.

The jackshaft in the backing plate has one threaded end and one end held in by a snap ring. Not a good idea to use the backing plate jackshaft.

Return and get your money back. GET US PICTURES OF EVERYTHING.

 

[panchothedog]

They are about $55 shipped to my door in PA in three days.

The jackshaft in the backing plate has one threaded end and one end held in by a snap ring. Not a good idea to use the backing plate jackshaft.

Return and get your money back. GET US PICTURES OF EVERYTHING.




View attachment 160207

Why do you say not a good idea to use the backing plate jack shaft. I have 3 of them in big heavy 2 seat karts running heavily modified 212 and 224 predator engines. They work fine. I think your advice to Squiddy is wrong. There are thousands of karts out there successfully using the plate system and it's jack shaft. He needs help to get his kart running. Not obstacles. The kit you show in post #61 is a killer deal and exactly what he needs. Buy it and use it as designed.

 

[Thepartsguy]

Why do you say not a good idea to use the backing plate jack shaft. I have 3 of them in big heavy 2 seat karts running heavily modified 212 and 224 predator engines. They work fine. I think your advice to Squiddy is wrong. There are thousands of karts out there successfully using the plate system and it's jack shaft. He needs help to get his kart running. Not obstacles. The kit you show in post #61 is a killer deal and exactly what he needs. Buy it and use it as designed.

Didn't the Amazon CVT you bought come with a plate. The plate that bolts to the engine. It has a perfectly good 5/8" jack shaft in it that fits the driven clutch. Use it and eliminate the 3/4" shaft that's on your kart.

I worded it wrong. IF he had a FULL 30 series cvt with pulleys the backing plate he shouldn’t remove the two 5/8 bearings and 5/8 jackshaft from the 30 series backplate and install it into this style engine mount jackshaft plate. He should buy a jackshaft threaded on both ends.

This guy got
-An extra short crank engine.
-One 3/4 driver (missing washer)
-One 5/8 driven
-One 3/4 jackshaft.

And I still never did ask him if his clutch is inboard or outboard sprocket?? I’m just thinking his off-road buggy with 7hp engine has an outboard clutch that would suck. UNLESS he would have ZERO trouble moving the axle sprocket when he deletes the engine mount style jackshaft plate and the 30 series torque converter plate moves the position of the driven sprocket. He goes through all this and finds out he needs the plate that raises and moves the engine over for 212cc mini bikes.

 

[panchothedog]

Is that a picture of one of your karts or his? I never saw any picture posted by him. Maybe he should just buy a driven with a 3/4" bore. Not popular, but they're available from some shops. Reading posts #33 where he ask if the washer should be rubber or metal, leads me to believe that he does not have a lot of mechanical experience. The bigger bore driver ( regardless of cost ) would probably be the easiest solution.

 

[Thepartsguy]

Is that a picture of one of your karts or his? I never saw any picture posted by him. Maybe he should just buy a driven with a 3/4" bore. Not popular, but they're available from some shops. Reading posts #33 where he ask if the washer should be rubber or metal, leads me to believe that he does not have a lot of mechanical experience. The bigger bore driver ( regardless of cost ) would probably be the easiest solution.

That’s a picture of my kart to show what type of jackshaft I think he might have.

Never seen a 3/4 driven and there is a lot of variables to look into before he can even install a 30 series.

If it’s some ”off-road 7hp gokart” as he stated I’m left to assume it’s a live axle with the sprocket hub welded to the live axle to match up to an outboard mounted clutch. OP should verify this with us before he even buys anything at all.

 

[Squiddy202]

That’s a picture of my kart to show what type of jackshaft I think he might have.

Never seen a 3/4 driven and there is a lot of variables to look into before he can even install a 30 series.

If it’s some ”off-road 7hp gokart” as he stated I’m left to assume it’s a live axle with the sprocket hub welded to the live axle to match up to an outboard mounted clutch. OP should verify this with us before he even buys anything at all.

It is a Murray explorer, it does have a live axle, I don’t know about a welded sprocket. To be honest, I already talked it over with my dad and brought the GPS one. It comes with a belt and the 3/4” driven. The prices almost equal out from Amazon. It would probably be a slight bit less if I do it the other way but not very much like at all.

 

[Hellion]

I’m gonna reread this thread to find out how it went so wrong (Post #38) .
I did a quick scan and there’s still no photos of his kart or the actual engine in this thread so I am forced to conclude it doesn’t exist. Maybe his kart is posted in his earlier threads but I ain’t going there. Sounds like a lot of work. Sorry Squiddy lol Jk.

A good idea to “run your purchases through the forum” before pulling the trigger. You won’t offend anyone by posting amazon links or whatever and asking if this or that product is good to go.

We were promised a pic in post #58….

 

[Hellion]

I just noticed the valve cover on his engine from post #13. OHC, aka Overhead Cam. Is that legit or just a Chinese typo?



OHC engines are a cut above pushrod engines, at least in the cool factor. Show us more of this engine and the brand identifying factors.

 

[Squiddy202]

I just noticed the valve cover on his engine from post #13. OHC, aka Overhead Cam. Is that legit or just a Chinese typo?

View attachment 160268

OHC engines are a cut above pushrod engines, at least in the cool factor. Show us more of this engine and the brand identifying factors.

It’s a Subaru.

 

[Denny]

OHV it should read. I’m surprised Fuji/Subaru got it wrong.

 

[Denny]

No wonder the CVT 30 series won’t fit! That’s NOT a CVT on there. That is a centrifugal clutch and pulley system. Send your junk back and get a back plate system or repair what you have. Pictures earlier could have saved you and us so much trouble!!!!

 

[Squiddy202]

No wonder the CVT 30 series won’t fit! That’s NOT a CVT on there. That is a centrifugal clutch and pulley system. Send your junk back and get a back plate system or repair what you have. Pictures earlier could have saved you and us so much trouble!!!!

No I knew what it is, I want to upgrade!

 

[Squiddy202]

OHV it should read. I’m surprised Fuji/Subaru got it wrong.

Not sure it is wrong…

 

[Sparkwizard]

OHV it should read. I’m surprised Fuji/Subaru got it wrong.

Looks like a timing chain to me. OHC is correct.

 

[Sparkwizard]

I'm gonna vote for the solution proposed be @Thepartsguy.
If you show a picture of the sprocket on your axle, we can tell you if it is welded or if you can move it over to the left.
If you can move the sprocket, then a plate CVT system might be the best option. Then, you would need to remove the original jackshaft and possibly, the mount.

 

[Squiddy202]

I'm gonna vote for the solution proposed be @Thepartsguy.
If you show a picture of the sprocket on your axle, we can tell you if it is welded or if you can move it over to the left.
If you can move the sprocket, then a plate CVT system might be the best option. Then, you would need to remove the original jackshaft and possibly, the mount.

Listen that sounds nice, but I was really excited to get cracking and ordered the CVT for jackshaft like 2 days ago. Between shipping and price of a kit with plate I would only save like 20 bucks and this option is easier/more stock.

 

[Sparkwizard]

I hope your jackshaft is long enough. If not, a longer shaft is pretty cheap. Good luck.

 

[Squiddy202]

I hope your jackshaft is long enough. If not, a longer shaft is pretty cheap. Good luck.

Ummmmm… How much is pretty cheap? Edit: for a rare 3/4” jackshaft. I mean a CVT is the stock option… I already blew so much money ~$125 on a $50 upgrade…

 

[Sparkwizard]

14" x 3/4" Jackshaft With 3/16" Keyway Hardened Steel For Go Kart Mini Bike | eBay

3/4" Jackshaft - 14" in length. 3/16" keyway - keyed all the way through. 14" x 3/4" Jackshaft With 3/16" Keyway For Mini Bike Parts. Keyway 3/16". This item is great for mini bike and go kart applications as well as other recreational vehicles.

www.ebay.com

JUST THE SHAFT after you determine the length you need with your sprocket and the new driven setup.

 

[Thepartsguy]

Listen that sounds nice, but I was really excited to get cracking and ordered the CVT for jackshaft like 2 days ago. Between shipping and price of a kit with plate I would only save like 20 bucks and this option is easier/more stock.

You’re going to have to measure out and buy a custom length comet belt.

The 30 series cvt kit complete with backing plate has a non adjustable pulley spacing and belt that I’m almost guaranteeing won’t match the spacing of the custom cvt jackshaft system your in the process of making.

Next your clutch is in fact mounted inboard so you are lucky but that does not matter as your making a custom setup anyway.

Sparkwizard very well may be 100% correct your jackshaft now has a very thin driven mower style pulley and your wanting to slap on a very hefty cvt style pulley. The jackshaft you have now MAY not even be long enough.

And then we haven’t even gotten close to the point of whether you’re happy with your new CVT gearing. You may want a $20 c-sprocket that gives you more torque. Maybe it has tons and tons of power and you want to gear for just a touch more speed.

If your making a custom setup with zero parts horde your gonna have lots of unseen costs all over the build.