Mini Bike Tune-up

high.rev.trev said
Good Job, I must take some pics of 1 similar I have here to restore: its an Australian Deck'ston "Rockhopper" were actually made in Taiwan l8ke the Honda 50 super cub scooters
( this actual 1 I used to race against as a kid on my worked Honda QA50 & 40 odd years later I by-chance found it on online auction: I reckonised the critter that used to reel me in & pass me on back straight) Even uses QA50 Wheels & tires with a 3.5-4hp Tecemush (Which had a tossed chain hole blown in crankcase seller DIDN'T Point out on pick up.) Fixed that with that 2pack expoxy stick & fresh set of rings & valve seat grind. Fitted a S90 20mm Keihen Honda Carb & did that engine lap it up, with a teriffic slow stable idle & 1 pull starting.
I'm swapping the industrial eng out now & going to install a 3speed semi-auto 7.5hp Honda C90 scooter engine geared for granny 1st & removing 60 tooth sprocket & bolting on a Std QA50 repl sprocket (bolts straight to exact same qa50 wheel hubmounts !)
Looks a wreck now but only surface rust. Upgrading with Chinese throttle assembly (7/8" bars)...
Fun to be a kid again.
Snuck in a boring pic or 2 of the Rebuilt Tecamush before painting.
More base model Desksons didn't have the Sprung seat or Chrome Fenders (I need original Rear & fuel tank if an Aussies are reading) Saw one on 'Gumtree' AUST craigliat equiv Restored for $1500 - got th8s blown eng one in better COND for $45.
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PS if someone has a complete Honda QA50 front wheel & brake assembly p.m. me , as this bike came stock with QA rear drum brake only, no brake on front.Pls pm me: need Axle to but on other side incl brakedrum shoe backing plate.
Thanks Trev.

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Even got Original Cheng Shin front n back tyres 45yrs later (good tread)
Anyone else have one of these industrial eng Bird engineering type mini (pit) bikes ??.
Learnt yes later I could've Geared up MY QA50 to stop this Critter blowing me off down back straight: the drive sprocket was 420 chain & SAME spline as bigger bikes, could've gone 1-2 tooth up & got another (hang on!) 5mph (milled the Head heaps & ran on military AvGas ;-) brew ).
Also learnt racing with its autoclutch disengaged with the gearlever held down you could do full throttle dropped clutch starts just by letting up on held-down gearshifter..got many a holeshot lol.