Custom scooter build codename "MilfHunter"

[NSR-Dan]

Hey back again after a while.

Putting up my latest project, a ground up very fast 4T scooter build.

I bought a crap chinese scooter from trademe for $54 dollars that wasnt working, but it had what i needed which was an un bent frame and a GY6 50cc engine case that wasnt wrecked.

i started by ripping the engine right down for a blue print and full rebuild with new (non chinese) parts. i dremmeled out all the machining marks in the engine case and grinded all the oil tracks to the honda GY6 spec cleaned it all up so it was all nice and tidy.

Ordered all the internals which was a new crank from scooter attack in germany, the cylinder is a 90cc made by BGM with a super corsa piston, head is a performace variant with big valves and larger porting and a race cam shaft also from BGM in Germany.

Put the engine all back together checked timing and valve gaps. Now coming to the carb it was difficult as i could not find a matching intake manifold for the carb to the head that was a 21mm, so a i bought one that matched the head and modified to suit but filling with JB weld and port matching to the carb with a custom made insulator.

Gearbox being a CVT needed an overhaul so a new sport variator from Naraku in Japan that is designed for modified engines above 72cc, the clutch needed to be good to cope with the power to the wheels, so a RMS racing clutch with adjustable springs which i have set to release at 3000rpm, also fitted a heavy duty contra spring and racing clutch drive plate for better acceleration. replaced all the bearings in the final-gear box that i sourced from SKF and filled with motul performance GB oil.

Still need to make up the loom for the scooter but i have already got a racing CDi and racing coil for a Yamaha scooter, a new Trailtech vapour will be hard wired into the loom with an RPM guage and engine temp, also got a digital rectifier from KOSO to help with getting the right voltage through the system as the chinese ones suck, tail light to be fitted is from an 07 ZX-6R and still deciding what to do for the front.

Frame has been cut up and re-weled as its going to have a naked rear end. fuel tank has been lowered to allow for a lower seating arrangement, handle bars are to be replace with a downhill mountainbike set up, so it should have a good setup for knees down scooter riding lol. Brakes have been tidied up and have fitted braided lines that my friend made up with earls fitting and airoquip lines, Suspention on the front was rehauled with new valves and oil and bought a YSS racing shock for the rear also got some new wheels as the others were fckucked and fitted some nice michelin S1 scooter tyres.

Still a bit to do with the welding and electrical, gota put the gearbox together and get the engine started but ill keep everyone posted as i update everything. and if anyone asks why a chinese scooter, well the answer is that parts for the engine are cheap and easly available, and the only chinese left is parts of the frame and the engine casing, otherwise its german, japanese and a bit of kiwi.

[NSR-Dan]

Pics arnt in order sorry.

[NSR-Dan]

some more pics

[NSR-Dan]

More pics :D

[Metalor]

So why is this called Milfhunter? That's what I wanna know!

I'll help you hunt for some milfs! Or cougars, whatever you wanna call them!

Like a fine wine they say :p

[R6_kid]

I wanna do something similar engine wise with a Yamaha Jog, but then put it together with an 06 R6 front fairing/lights and tail end.

[davereid]

cool project..

[NSR-Dan]

So why is this called Milfhunter? That's what I wanna know!

I'll help you hunt for some milfs! Or cougars, whatever you wanna call them!

Like a fine wine they say :p

Duno, it was my mates idea as ill register as this.

[MisterD]

Nice work, needs a re-shaped seat and dropped bars then take it on the track at Mt Welly.

[NSR-Dan]

Nice work, needs a re-shaped seat and dropped bars then take it on the track at Mt Welly.

thats the idea. ill be using a downhill mountain bike setup to drop the bars, not sure about the seat though, illl welding some pegs on it for a different seating position.

Got some more parts from scootling.

Stage 6 Racing clutch bell
Naraku High Speed variator
Malossi kevlar belt
str8 Belmouth filter
and some fuel hose

[NSR-Dan]

Latest additions. Put together the gear box, and if anyone is interested the set up is naraku high speed variator with 6.3gr weights, 1000rpm contra spring, RMS racing clutch with weener springs set to 2500rpm, stage 6 winged racing clutch bell and all connected with a malossi kevlar belt.

The carb has a nice bell mouth fitted.

[MisterD]

Yer a bloody nutter - spending that much coin on a filthy auto :shit:

[Taz]

Wonder what kind of milf's you'll pull with that??

[MisterD]

Wonder what kind if milf's you'll pull with that??

Mopeds I'd Like to Fettle?

[NSR-Dan]

Yer a bloody nutter - spending that much coin on a filthy auto :shit:

I think its about 2k all up. most is on the engine, the rest is home made. so not that much compared to if i bought a ready made one such as a vespa adly etc. plus is the fun of building, and gives me an excuse to get more tools, which im sure made sarge happy :P

[Del Fuego]

Hey Bud,

This is a cool project. Would love to document it on our site if you wouldn't mind? It is the sort of thing our readers would be interested in.

Let me know.

Cheers

Vince

[ICE180]

Glad to see someone else putting lots of money into something that was made to only go a certian speed but wants it to go FASTER

[Taz]

Must be some bloody fast MILF's where you are........

[NSR-Dan]

Yep there very fast :chase: :scooter:

[Blatman]

Jeez dude! Hey I've got a spare V-Max engine, reckon you could help me drop that into a scooter?? :niceone:

[NSR-Dan]

Jeez dude! Hey I've got a spare V-Max engine, reckon you could help me drop that into a scooter?? :niceone:

why not, the only problem i would see is finding tyres speed rated to cope. i can picture sitting on the engine with a custom extended swing arm with stock rear wheel and a larger front wheel, i think all it would serve would be a real fast drag scooter, as the wheel base would be huge.

[Del Fuego]

Hey bud,

Here is the link to the article on the site.. http://www.thescooterreview.com/reviews/long-term-fleet/414-custom-qchineseq-50

Keep us up to date with progress

[NSR-Dan]

Cheers, ill get some more pics up tonight. so far half the loom is done, i have got an adapter plate for the carb which needs to be port matched to get it running nicly, however have given it life, and started first kick.

[NSR-Dan]

Update to the build. have been working on the wiring which is complete for all the engine componants only lights to be done. have fitted the carb on the best angle with the adapter plate so the fuel can feed into the carb freely, and have started it. goes fine but no gasket between the adapter and head so i guess there is air leak which is making the revs fluctuate, which is not to worrying as i need to dremmel out the adapter to port match the intake.

engine is going to come of the frame as the shock needs to be repositioned as there is a clearance issue with the shock and tyre (only 1mm clearance with a 3.00/10" tyre) will be moving a good 15mm over which will gve plenty of clearance to fit a 3.50/10" slick.

While the engine is out ill finish the frame with its front end and handle bars which are downhill mountain bike bars kindly donated by a friend.

more updates to come.

[NSR-Dan]

here is a full list of mods for the scooter ill add to the list as i go.

Engine:
139QMB GY6 Honda copy, 50cc, 4 stroke.

Engine blueprinted and fully rebuilt.
BGM Crankshaft (with nachi bearings)
BGM Big bore cylinder 94cc
Super Corsa piston 53mm
BGM Performance head (bigger valves and ports)
BGM Sports Camshaft
Sports cooling fan
Tecno Racing Exhaust


Transmission (CVT)

New bearings from SKF
Naraku high-speed variator
Naraku Drive Plate (ordered)
BGM Clutch Torque plate
RMS Racing Clutch
Malossi Kevlar Belt
Stage 6 racing clutch bell

Fuel

21mm PWK Carburettor
Str8 Drag bell
Custom modified intake manifold
Direct fed fuel with manual shutoff tap
High flow filter

Electrics

Racing CDI
BGM Racing Coil
Denso Iridium Spark plug
Trailtech vapor dash with speedo, RPM and temp
Custom made loom
ZX6R tail light

Frame, wheels & brakes

Custom modified frame
Downhill mountain biking drop bars (to come)
Disk brake front, drum rear
Braided brake line
EBC brake pads
Alloy wheels with Michelin S1 tread
Rebuilt front shock
YSS rear Racing shocks

[UberRhys]

here is a full list of mods for the scooter ill add to the list as i go.

Engine:
139QMB GY6 Honda copy, 50cc, 4 stroke.

Engine blueprinted and fully rebuilt.
BGM Crankshaft (with nachi bearings)
BGM Big bore cylinder 94cc
Super Corsa piston 53mm
BGM Performance head (bigger valves and ports)
BGM Sports Camshaft
Sports cooling fan
Tecno Racing Exhaust


Transmission (CVT)

New bearings from SKF
Naraku high-speed variator
Naraku Drive Plate (ordered)
BGM Clutch Torque plate
RMS Racing Clutch
Malossi Kevlar Belt
Stage 6 racing clutch bell

Fuel

21mm PWK Carburettor
Str8 Drag bell
Custom modified intake manifold
Direct fed fuel with manual shutoff tap
High flow filter

Electrics

Racing CDI
BGM Racing Coil
Denso Iridium Spark plug
Trailtech vapor dash with speedo, RPM and temp
Custom made loom
ZX6R tail light

Frame, wheels & brakes

Custom modified frame
Downhill mountain biking drop bars (to come)
Disk brake front, drum rear
Braided brake line
EBC brake pads
Alloy wheels with Michelin S1 tread
Rebuilt front shock
YSS rear Racing shocks

You should bring it here: SCOOTER DYNO DAY at Henderson Yamaha, Auckland. 27th June @ 1300 (http://www.kiwibiker.co.nz/forums/showthread.php?t=99161). Would be cool to see what it now does. What would it be compared to back when it was standard, a bit of before and after...

[NSR-Dan]

went for its maden run yesterday, didnt have a spare bike battery so i strapped a car battery to the floor of the frame.

was very happy with the result, suspention felt good, engine felt good, and it powerwheelies of the mark with little effort and this is with the engin untuned and running rich as F%^K.

[carver]

went for its maden run yesterday, didnt have a spare bike battery so i strapped a car battery to the floor of the frame.

was very happy with the result, suspention felt good, engine felt good, and it powerwheelies of the mark with little effort and this is with the engin untuned and running rich as F%^K.

how is it going now?

[DELLORTO]

SCOOTER DYNO DAY at Henderson Yamaha, Auckland. 27th June @ 1300[/URL]. Would be cool to see what it now does. What would it be compared to back when it was standard, a bit of before and after...[/QUOTE]

i bet there's going to be a few sad faces at that one :weep:

[Brian d marge]

we have scooter drag racing here

havent been there in awhile but its wayyy fun

Some nice kit to !!!!

Stephen

[RavenR44]

we have scooter drag racing here

havent been there in awhile but its wayyy fun

Some nice kit to !!!!

Stephen

Err... wouldn't "scooter drag racing" be fast trannies on Vespas?

I'm prepared to bow to your superior knowledge that it's "wayyy fun" and "Some nice kit [too]". :D

*chortle*

[XRVrider]

we have scooter drag racing here

havent been there in awhile but its wayyy fun

Some nice kit to !!!!

Stephen

Must be fun, what are they riding? What size engines etc...? I've seen some Asian scooter racing, but they were easy doing 140 - 160kph, on very maneuverable bikes, think they were 125's or 150's... not sure on that. Were some nasty and spectacular spills.

What u riding RavenR44? If you still shopping, bite me, scoots are at least riding :scooter:

[SKUTA-MAN]

Hey I'm modding a Yamaha jog (07) I'm wondering where you got the 5-spoke rims for the bike?
I have a crashed jog, and a Honda Dio (AF27) with a blown motor...
so... I'm transplanting the Yamaha motor and loom into the Dio, but I need a wiring diagram for the jog.
What do you think, and can you help?

[hmmmnz]

send me a pm about the wiring diagram, i should be able to draw you one up

[ScarFace]

This was on trademe for a while aye? I was watching it but got distracted and missed what happened, how did it do?

p.s it looks sick.