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  Topic Review (Newest First)
01-07-2020 02:35 PM
EPR
Re: Hi all new to the forum

Way to go Steve. You will see a big difference in your low end.
01-07-2020 12:07 PM
CAM2
Re: Hi all new to the forum

Quote:
Originally Posted by Steve2020 View Post
Got my new front and rear sprocket just need the chain now and to modify the rear mud guard mount and chain guard mount as the new sprocket touches them.. ... Old sprocket is on top
It will be pretty torquey now......
01-07-2020 07:35 AM
Steve2020 Got my new front and rear sprocket just need the chain now and to modify the rear mud guard mount and chain guard mount as the new sprocket touches them.. ... Old sprocket is on top
12-29-2019 08:26 AM
CAM2
Re: Hi all new to the forum

Quote:
Originally Posted by Steve2020 View Post
Aahhh yes just squeezed into the shed and held the chain next to the mini bike.. The quads chain is definitely bigger... Pics attached

So guessing 6mm on bike and 8mm on quad

Thanks
Yes theres a #25 on the minibike and a TF-8mm on the miniquad.

Just know if you buy another TF-8mm pinion and rear sprocket you can make the pocketbike TF-8mm or the pocketdirtquad to #25 to keep both chainsets the same too.

Theres 3 different types of drive chains they use on pocketbikes , pocket dirtbikes and pocket quads.…Technically theres actually 4..

#25 is like linguini, There s nothing smaller for these pocketbikes

25h is slightly beefier as H stands for Heavy Duty..The first pic shows a 25h.



TF-8MM which looks exactly like the oval shapes of the chainlinks on a timing chain.



#410 which looks exactly like a bicycle chain just slightly wider...…



#410 chain is also used for chaindrive garage door openers..



Theres a parafin wax and oil treatment you can do with some heat inside a metal can that's done to new chains to properly pre-lube to protect the chain from initial damage to the link rollers when initially used.

Im sure theres like 1000 vids on utube on the process that can be researched...Its actually very easy..

Another point to touch upon is whether to use or not to use a masterlink….

I say buy a chainbreaker tool that can do both types of chain and mend both chains without a masterlink…...Theres nothing like losing the link and having to carry or push something so small home.....

Good Luck
12-29-2019 06:23 AM
Steve2020 Aahhh yes just squeezed into the shed and held the chain next to the mini bike.. The quads chain is definitely bigger... Pics attached

So guessing 6mm on bike and 8mm on quad

Thanks
12-28-2019 08:51 PM
EPR
Re: Hi all new to the forum

8mm is much bigger chain than #25 Cag chain, 25 has about 750lbs strength and 8mm 1200lbs, used a lot with scooters and piston port engines and trans.
12-28-2019 11:10 AM
pntrbl
Re: Hi all new to the forum

Yep. 8mm pin to pin. Same as 5/16. Should be 3/16 between the inner plates as well.
12-28-2019 06:31 AM
Steve2020 Thanks all

Hope you had a good Christmas

Been looking around and seems like i need 8mm setup. How do I double check this? If I measure chain link pin to chain link pin will that give me the size?

Largest 8mm rear sprocket seems to be 74 and smallest front for the quads transmission 11

Thanks
12-24-2019 11:34 PM
EPR
Re: Hi all new to the forum

With the 3 to 1 trans and if you had 11/72 sprockets you would have about 9.6 to 1, still a little high for you, with a 78 you would have 10.09 to 1. If you could find an 80 plus tooth rear you might get 10.5
12-24-2019 03:56 PM
CAM2
Re: Hi all new to the forum

Quote:
Originally Posted by Steve2020 View Post
Heres the bike and quad I have
Looks like a Chinese made mini King Quad 49cc 2 stroker with electric start and headlight...

Like this model....


11 and 72 would be 6.6:1 ratio plus you need to add in the transmission reduction too..You need 12-13:1 ratio for a 1.9hp miniquad for a rider over 80lbs..Just don't expect more than 11mph fully topped out also...

Judging by the sprocket on the transmission you need a Tf-8mm chain

If you can't get the ratio any higher due to size limitations you need to use a clutch Bell with a 6tth Tf-8mm pinion then realign the rear sprocket or mod the engine closer to 4hp....

Good Luck
12-24-2019 02:25 PM
MrKitty its the big tire mini with the CAG engine and the pit bike trans
12-24-2019 02:22 PM
Steve2020
Quote:
Originally Posted by EPR View Post
That's where you confused me. That is a 15mm/ 6 spline trans shaft, not 6 tooth gear and the one you show looks like it has a #25h sprocket, the smallest gear for it is 11 tooth which would help you with more low end. Fine a #25 / 72 tooth rear sprocket if you want to go lower. The Repsol is an MT-A2 full fairing Cagillari Daytona, and your mini quad/ATV.
Thanks thats great. so hopefully a 11t front and 72t rear will get me around? 🙂

Abit like a mountain bike small on front large on back and feels like little effort gets you going (but slow top speed)

Oh would it be a 6mm chain? Or 8?

Thanks again happy Christmas
12-24-2019 01:47 PM
EPR
Re: Hi all new to the forum

That's where you confused me. That is a 15mm/ 6 spline trans shaft, not 6 tooth gear and the one you show looks like it has a #25h sprocket, the smallest gear for it is 11 tooth which would help you with more low end. Fine a #25 / 72 tooth rear sprocket if you want to go lower. The Repsol is an MT-A2 full fairing Cagillari Daytona, and your mini quad/ATV.
12-24-2019 05:35 AM
Steve2020 Heres the bike and quad I have
12-24-2019 02:15 AM
Steve2020
Re: Hi all new to the forum

Tried uploading some pics of what it looks like (well screenshots as its freezing outside and wet lol) hope they work

Thanks
12-23-2019 11:15 PM
EPR
Re: Hi all new to the forum

If they pressed a 14T 8mm over a 6T Cag pinion on Cag clutch housing sounds like trouble to me. What ever you do the front gear has to line up with you rear sprocket, I need to see some photos your almost to 11 post. If you add the trans with the inner sprocket will it line up?? You can add chain, I buy mine 10ft at a time with a few master links and use my 4 1/2" angle grinder to grind the chain pins down.
12-23-2019 06:58 PM
Steve2020 Oh also how do I choose the correct length chain for the 72 tooth sprocket ? Do I just measure the current one and add the length of 18 links? (difference between 54 and 72 tooth sprocket)

Thanks
12-23-2019 06:19 PM
Steve2020
Quote:
Originally Posted by EPR View Post
You have a 6 tooth 05T front and 54 rear and T8F 8mm chain. That sprocket is much bigger than a #25h 6 tooth so no problem, which gives you a final ratio of 9 to 1 a little to much for the weight you have. A 78 tooth rear would give you a 13 to 1 ratio, maybe a little low. A 6 to 72 is 12 to 1 which is what I would look for. Depends on how much top speed you want compared to low end torque. On my 110cc dirt bike I put a smaller front gear for more bottom end, and I can spin the rear tire out of the corners.
Thanks so because the 14 tooth front sprocket is pressed over the 6 tooth one on the front its classed as a 6 tooth?
12-23-2019 03:11 PM
EPR
Re: Hi all new to the forum

You have a 6 tooth 05T front and 54 rear and T8F 8mm chain. That sprocket is much bigger than a #25h 6 tooth so no problem, which gives you a final ratio of 9 to 1 a little to much for the weight you have. A 78 tooth rear would give you a 13 to 1 ratio, maybe a little low. A 6 to 72 is 12 to 1 which is what I would look for. Depends on how much top speed you want compared to low end torque. On my 110cc dirt bike I put a smaller front gear for more bottom end, and I can spin the rear tire out of the corners.
12-23-2019 02:17 PM
Steve2020
Re: Hi all new to the forum

Quote:
Originally Posted by MrKitty View Post
thats your problem a 14 tooth front sprocket is 0_0 i whould go with something more reasonable like a 7 tooth front https://www.monsterscooterparts.com/...caAtrgEALw_wcB
Would something like that fit my quad as it uses a clutch housing like this -

https://www.wish.com/m/c/59cb0fff9ae...caAjV8EALw_wcB

Thanks
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