News update: It's in running condition!
Wow, what a fun it is to build and ride such a minibike!
As I mentioned earlier, the brake discs had been lasercut, along with the caliper mounts.
Frontdisc: custom made, 180mm diameter, 3mm wide. Perfect fit with the frontaxle assembly.
Reardisc: custom made, 180mm diameter, 3mm wide. Perfect fit with the rearaxle assembly. Bolts have just 1mm clearance to the frame.
With a front sprocket of 15T, I choose to mount a 90T (#219 chain) sprocket on the rear. 1:6 ratio.
After drawing caliper mounts in CAD, they have been lasercut. I couldn't have done it better with a grinder.:grind:
These are "foating" calipers, but I had to change a bit on them, because the bolts, that let them float, came in contact with the brake disc. Fixed the problem.
Dutch minibike, ready to rumble...
My oldest daughter having fun.
That would be me.
Today it drove for the first time.
-I choose to go with a 1:6 ratio. As I didn't have any bigger rear sprockets, just smaller. And I thought it would be easier to shorten a chain as to lengthen it. (if I ever consider a smaller rear sprocket)
-This ratio is just about right I think, after today's riding. The hour/tachmeter registered 3 hours of driving. I have to mention that this tachmeter isn't very accurate.
-The clutch is a bit noisy when it's slipping (a bit of metal scraping sound-ish), once it's locked, the noise is gone.
-A lot of vibrations, as there is zero suspension. Maybe, tires to much inflated.
-Taking turns is easy, it handles just great.
-It outruns a 110CC quadbike, flat out.
-Overall; pretty happy with how it turned out.
All it needs now are the final touches.
"Stay tuned"