Coleman BT200X | Don't Buy A Torque Converter For Your BT200X Before Watching This! | Wet Coast Fab

The stock centrifugal clutch on the Coleman BT200X mini bike is decent enough, but it has limitations when faced with more demanding conditions. For example, I experienced difficulty getting the mini bike going up a steep hill, as the clutch dragged the engine down, preventing it from providing enough power to overcome the hill.

In a previous video (   • Coleman BT200X Mini Bike In The Snow ...  , I tried to run the Coleman minibike through about 18" of snow. While traction was tricky, the centrifugal clutch caused a lot of drag, preventing the engine from getting up to speed.

In this video, I'm installing a Vevor torque converter (a continuously variable transmission) that should allow the engine to rev up faster and help the bike reach a higher speed. This transmission is a copy of the Comet TAV2 transmission, commonly found in bigger street scooters.

I encounter some challenges during this installation, and I'm unsure if the HiSun 196cc engine with its 16mm shaft will work with the Vevor torque converter. However, I plan on replacing the HiSun with a 212cc engine soon, which has a 3/4" shaft, making it compatible with the torque converter.

Join me as I figure out this installation process!



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0:00 - Introduction
0:49 - The stock centrifugal clutch
1:58 - The new torque convert transmission unboxed
3:08 - Kiki the cat comes to inspect
3:11 - Torque converter components in detail
3:44 - 5/8" (16mm) to 3/4" shaft adapter
3:48 - HiSun engine output shaft
4:41 - Getting a top speed baseline on the minibike
5:10 - Baseline top speed results
5:26 - Removing the old centrifugal clutch and jack shaft
6:38 - The crankshaft seal on the HiSun motor is leaking after 3 hours!
7:14 - Installing the new torque converter
7:24 - Cross support is in the way!
7:42 - Frame interference!
8:18 - The plan to install the torque converter
8:46 - Warranty warning!
9:28 - Removing the throttle cable
9:52 - Removing the kill switch wires
10:04 - Disconnecting the headlight connector
10:17 - Disconnecting the engine from the engine mount
10:29 - Thinking out loud about the engine spacer
11:01 - Cutting out the cross support
11:07 - Test fitting the torque convert backing plate
12:37 - The clutch bolt is wrong for this engine
14:04 - The shaft adapter is too thick
14:19 - Using the engine and some sandpaper to make the adapter fit
14:59 - Banging on the first half of the driving pulley
15:40 - Putting on the belt bushing
15:52 - Putting on the belt
16:01 - Checking alignment of engine and chain
17:05 - The first attempt at an engine spacer
18:35 - Reassembled, outside and ready to test!
19:15 - First start
19:30 - First ride!
20:04 - Messing with the governor
21:57 - Another test start with more throttle movement
22:08 - Still not running great
22:31 - My first attempts at engine mount's not so good
23:02 - A much better engine mount with square tubing
23:35 - Another test ride
23:46 - Should you buy a torque convert for the Coleman BT200X?