For the most part, I'd say this is true Tom, on the other hand I've built a bike that is a reliable daily cruiser and it also does quite well on the race track. It only puts out about 6.25 HP, but it's a heck of fun bike to ride (or race)!
Cheers!
True, to a point, Scotto.
Yes you can build a machine/vehicle that might serve two purposes. The little sedan seen in my avatar is capable of a 12 second quarter mile, yet, it is fully streetable and has been driven cross country several times. However, If I was to get serious about drag racing and had a desire to win at it, I'd have to make changes to the car that would make it less than desirable to drive on the street or highway. Lower rear gears, higher lift/longer duration cam, less than tolerable exhaust noise, etc, etc. No thanks. The car was built to be driven and enjoyed on the street, not the drag strip.
My concern is that the new and inexperienced motorized bicycle builder, who usually wants more performance from his bike than a stock engine will provide, will see and read the high performance/race suggestions and either successfully, or not, apply them only to discover that his mild mannered little bike will only now satisfy him at or near WOT conditions. Riding a bike at those power settings and speed isn't practical for most people.
In some places speed limits imposed on a motor assisted bike will make it illegal. If your bike will only run smoothly and reliably at 30+ mph, think how undesirable it would be to take a quiet liesurely ride around the trails or neighborhood. And let's face it. That's how the majority of these bikes are ridden. Sure, everyone wants their bike to run good, start easily and propel them around at reasonable speeds but to suggest major modifications aimed primarily at the racer seems inconsistant with the hobby as it applies to the majority or bike builders.
I have no doubt that your bike will ride and race but you are not a new or inexperienced builder. This is my point. This forum was established for the purpose of helping new builders successfully assemble and enjoy a motorized bicycle. They are the ones who need good solid help and advice. I simply want them to understand the ramifications of building a high performance engine verses just making what they have reliable and fun. There will be a time later when they can apply some performance enhancments but lets get them on the road and let them enjoy their bike a little before sending them to the race track. Is that asking too much?
Tom