Ts/tf100

**Yow Ling** · 24th March 2009, 16:28

I have a bucket with TF 100 motor. This motor is from Sketchys old bucket RG100, a Pete Sales engine. took it to the track today , did some jetting and messing round. It has a dark side It has wicked vibration about 5-6-7-8K (no tacho just guessing) then it comes smooth. this is the kind of vibration that turns your hands to jelly, im thinking the most likley suspect is the crank cant really be much else, before I put another crank in Is this just the way they are and I should harden up and weld the exhaust on better so it dosent fall off so quickly, or is this un-natural behavior that can be resolved easily?

**Buckets4Me** · 24th March 2009, 17:09

have you asked Pete Sales about it ????
asuming he built the engine. Quick phone call may tell you it's normall
or you are in for a big rebuild

just a thought

**Buddha#81:Me** · 24th March 2009, 17:48

Originally Posted by Buckets4Me

or you are in for a big rebuild

just a thought

Looks like you may have more than one rebuild Mr Ling!

**diesel pig** · 24th March 2009, 18:05

Speedpro posted on another thread about getting aluminum stuffers put in the balancing holes in the crank of his TS100 motor, He did this to up the crankcase compression but did notice it smoothed out the motor too.

**speedpro** · 24th March 2009, 18:07

They do that. Remember the motors are built as farm bikes and as such are designed to max out at about 5-7000rpm and are balanced accordingly. If you dismantle the engine and take the crank out you will see that each flywheel has two holes it, one each side of the crank pin. Press a slug of aluminium into each large hole and she'll be silky up round 10-11000rpm. It'll rock a bit down low but who cares. I got Pete to do it to mine and it worked great. Stopped things breaking off EVERY meeting.

The cranks are crap and it is a good idea to replace the mains with phenolic resin caged C3 bearings for reliability. The rods are all superseded to RM silver plated cage type kits so that's good. Don't go ballistic on the piston port they don't like it. Whatever you do leave the intake port bridge in. The pistons crack as it is and taking the bridge out is inviting disaster every 2nd meeting. I used RG400 rear pistons and found they were good for a couple of reasons. I used to spend quite a bit of time preparing the pistons before use which seemed to help reliability. PM me if you want some more info.

**speedpro** · 24th March 2009, 18:11

Originally Posted by diesel pig

Speedpro posted on another thread about getting aluminum stuffers put in the balancing holes in the crank of his TS100 motor, He did this to up the crankcase compression but did notice it smoothed out the motor too.

Actually i did it purely to rebalance the crank.

**Yow Ling** · 24th March 2009, 18:30

Originally Posted by Buddha#81

Looks like you may have more than one rebuild Mr Ling!

My 4 stroke guy is on to it , not as bad as we first thought

**F5 Dave** · 25th March 2009, 09:14

So is that still in the RG frame? I had a bit of a tussle with young Hooziwhatsit in the last race at the BOB on my 50. I think he beat me, I should have been well ahead but had crashed my brains out & broken some ribs as it turned out. Sketchy had a problem staying on it in those days

. Was that one Goat's before I think. He was a hard charger on it.

**Yow Ling** · 25th March 2009, 11:04

Originally Posted by F5 Dave

So is that still in the RG frame? I had a bit of a tussle with young Hooziwhatsit in the last race at the BOB on my 50. I think he beat me, I should have been well ahead but had crashed my brains out & broken some ribs as it turned out. Sketchy had a problem staying on it in those days

. Was that one Goat's before I think. He was a hard charger on it.

We have had a round of musical frames, the RG50 frame now has a KV or KC100 or something, and the TF is in an old RG250 frame. Man you break yourself even more than me, and i thought I was doing it tough!