Actually Freaky H100's have a balance shaft and you can easily pick it when the balance shaft is not installed.Rebalancing the H100 crank is where I was forced to learn about it.I had that baby to 15,500 on the dyno one day!
Soz read back Loz, what im saying is it also HAD the balancer in it but we pulled it OUT and never looked back, if anything on that little motor we found it drew power, we got to the stage we used 5w fork style oil in the tranny to cut drag, we just started getting stupid, i only ever over revved it once and it shot the top end out, i used a KArt digital tacho on the plug and while tuning and racing we found the power actually dropped off dead after 12K , the way it was tuned, so keeping it below that band it was a very stable almost bullet proof bike , infact it only every let me down once in years of racing it, and to be fair to it, the over-rev incedent was infact that single event, and it happened on the main sweeper at mallala when i was dragging with a 4 stroke at a SA titles, i couldnt think for the life of me how that bike was staying with me so i kept it pinned > then poof we rolled across the line and spent the lunch break swapping to the 2nd motor, after spending that final round in the pack i noticed some other strange occurances, such as a bike that for some reason could 5 click gears instead of the standard 4 ? WTF.... another cheater had stuck a CR gearbox in the cases, after we finished the event, i cornered the ealier bike and found out the prick had stuck an illegal 150cc motor in a 125cc MA classed event bike. That was the last round of the 99 state titles, we won the series outright, but after the dust had settled i thought about the cheating little worms, then later decided that was the last road race i would do.
Since then i started to mess a little with DB on farms and as in the other thread 'Re: where have the old dudes' gone fell out with the competition idea as i felt it was tainted. Last year i joined a Dt club bought some old bikes and went racing again, and that guy with the dodgey gearbox bike turned up in the same Dt club, after a big fall out all those years ago, it seemed time does heals all wounds, he now has his kid riding and swings in a side car, he even came up to congrate me on the classes we took out this year, and it seems when you take a step back and think about all the time and money you spent to chase a little plastic trophy, in hindsight, once you have it, you realise how insignificant it is, this year i found all the compeditors in pre 75 riders did what they could to keep each others bikes on the track. in years of competing its the first time i have seen that work. it was a pleasure to compete and meet new freinds. ( sorry to digress) so in closing dont bother putting the balancer back in............