This all took a few years or so of playing, tuning, failing, breaking, rebuilding, & finally get running well.
I started with a VBC 150, 2-port, small flywheel taper version, no battery, with points...
& the plan & parts so far...
Have added a 3rd port (welded & grinding & all sorts of case mods etc...), 28mm Polini side-draft w vortex intake, modified Serie-Pro race crank, Polini straight cut Gear-up kit, DR race clutch (with high-tensile rivets -I've already torn it apart a few times), heavily modified Polini 177cc with GS piston & MMW head (NGK 9 or 10 plug), fast flow tap, Modified BoomStick (or possibly a very revvy Sterling) exhaust. I can't remember what other mods I've done, but if there are some I've missed let me know. I love revs, & speed, & oddly have enough torque to go up hills (usually in 2nd or 3rd), & have many exploded or torn apart clutches, & have many stuffed pistons from leaning out.
It is being built primarily for the Mille & longer distance rides & speed.
I have not used a lightened/plastic flywheel as hear that it has less inertia, & therefore less torque, also I don't think I'll use the Quadrini kit, as it can't be rebooted & I like the old-skol aggressive Polini
I've been looking & trying to work out front suspension (will use YSS Adjustable on the rear), as am keeping the 8" wheels, as its just so much more agile.
Need recommendation on tyres (it appears that Heidenau K75 are the only option).
I'm looking for the bigger front hub (posted elsewhere), so I can get better braking power, but can't find the hub.
Other things to work out:
Staying with points or going to electronics ign... I feel points may be a good idea as it should restrict the revs (as I love revs!), but if you have a recommendation for electronic ign that will work n the small taper, then I'd consider it (I'm resisting due to overall funds)
Stay with VBC standard Super 4-speed gears or use the longer LML gears... Considering I will have a gear-up kit as well. I gave a few other gearboxes available, so if you have teeth info let me know.
Possibly add a fuel pump... I am considering taking out the fuel tank & filling the void with a flexible bladder (& therefore would need a pump) to create a long range tank & to lower centre of gravity... I've had issues in the past (lots of them, & lots of breakdowns) due to leaning at WOT in 4th.. I simply cannot hold it open without major leaning (& seizing).
Is there any aspect I have missed, or you think I also need to add?
It's not often that I will ask for real advice, nor let others know what mods I've done/am doing, but I respect you guys & appreciate any assistance with this.
I'm looking for this front hub. & if you know of any bigger/wider/better brakes for the 8" let me know.
Last edited by SubEtherBASS on Mon Jun 07, 2021 2:22 am; edited 27 times in total