I got a Doodle Bug with the 6.5 horse upgrade.Keeps throwin the chain.It has a small steel strip with a pulley bolted to the frame that you move to adjust tension.Theres no motor adjustment(fixed hole).You just loosen the bolt and move the bracket/pulley to adjust tension.B.S. :hammer:Anyone here come up with a better 20th centry way to address this.Pics would help Thanks!!
if you run into problems with getting everything straight, do a search on here. quite a few people have posted different tricks and tips for getting the clutch and sprocket lined up.
make sure the engine is centered too. it's possible that the motor plate isn't square so that could throw off your measurements.
make sure the engine is centered too. it's possible that the motor plate isn't square so that could throw off your measurements.
A while back someone posted a tensioner that bolted to the side of the motor, yhere's a bolt hole there already drilled and tapped, the pulley came down on the top of the chain, I believe a spring was attached to the leaver, that held the pulley, and anchored to the motor mounting plate, Good luck either way you go!
dave
dave
I use a straight edge like a nice straight piece of 1/2" angle iron or if there is room use a long level, clamp the straight edge to the rear sprocket so it layes arcross as much of the sprocket surface as possible pointed towards the engine and then move the clutch over or engine until the straight edge lays flat against the outside edge of the clutch gear..
I've used this system on several bikes when making engine mounts and rear wheel spacers..
I've used this system on several bikes when making engine mounts and rear wheel spacers..
The mount plate isnt square with the frame.I used a piece of string,held it to the side of the back sprocket(since it had more area) with the chain off and moved the motor till the string touched the side of the front one.I slotted the holes and the bike works fantastic!!I threw away the tensiner pulley:thumbsup:Thanks to all with the good advice.
