GP Street Racer Build

Post pics & videos of your scooter, projects you're working on, a lovely Vespa that you saw at a rally, or anything else scooter related.
Boreham
registered user
Posts: 162
Joined: Tue Feb 05, 2013 7:58 pm
ebay user ID: rsboreham
Main scooter: GP225
Location: Leicester & Dusseldorf
Contact:

Sat Jul 25, 2015 12:25 pm

It started 18 months ago when i visited Scooter Restorations in Notts, a tour of the new warehouse yielded a boxed new early frame (number 001!) tucked away, i went for a few bits and left with a brand new frame, panels and a SIL factory engine!, expensive day out.
What started as an initial build to produce a 'new' std GP for rallies ended up being something slightly different, maybe my many years rallying historic cars felt the need for a bit more.....

A dry build of all the sourced panels was the best advise i had, even with a mix of new SIL and genuine panels meant everything needs slight adjustments, a good tip is time spent here gives a much easier final build, particularly on the leg shields, drill everything and double check.
Image

A decision on the final design and colour was a long winded search, do you stick to the traditional colours or go different?? hmmm, i finally decided on the Lechler 8059 Bianco, slightly odd i agree but the optic white just looked a bit, well, bright!
I was in a lucky position that my fried runs the sprayshop for a BMW dealer, so sneaking in the panels after hours was the order of the day, bit difficult with the frame, the results was excellent.Image
Image

Let the dry build begin.............

Boreham
registered user
Posts: 162
Joined: Tue Feb 05, 2013 7:58 pm
ebay user ID: rsboreham
Main scooter: GP225
Location: Leicester & Dusseldorf
Contact:

Sat Jul 25, 2015 1:15 pm

Stage 2 was the rebuild.
Everything went back together well, but as with all projects the direction changes every time you put something together, a tip is stick with your original idea, it easier and cheaper.ImageImageImage

Next came the engine, this was a much easier decision, i knew exactly what i wanted, a torquey but driveable unit. It seemed a shame breaking up a new engine!
Image

The casings were new so just a change of studs and bearings (all MB Racetour) etc.. the final spec was:

Monza 225 barrel, intake opened and ported to take the larger RD350 reeds.
Super Monza forged piston
Camlam super crank, a great engineered piece of kit (could not find a BGM in stock!)
TMX30 carb (25 pilot, needle on 2nd clip, 250 main & 40 power jet)
Franspeed exhaust.
Cyclone 5 speed box, short 36t fifth gear
AF Billet race clutch 18x47 gearing
BGM stator and flywheel
Augusto 6000 module.

Back to the Cyclone, there has been lots of issues but the feedback on mixed components definitely is a factor, on a bored day myself and a local motorbike engineering shop i use looked at the varying heigh of casing vs endplate and bearing/layshaft combinations, the results are scary!! anything up to 2.6mm measured between the face of the drive bearing to the inner endplate, hence why RLC include such a set of shims, we drilled a small hole where effectively the xmas tree and gears mesh in the end plate and you can get a scope in to ensure the meshing is correct.
My personal opinion is the box is not at fault, however RLC should never had marketed as a plug and play, recommend anyone uses a good engineer if they do not have the skills, the results do transform the scoot.

A set of Scomadi forks cam next with the outboard Bitubo shocks, mated with an R6 rear shock with 180lb spring, again transformed the final handling.

The final result
ImageImageImageImageImageImageImage

My only thought is, should i have opted for a set of drops, any opions on how they handle and importantly comfortable to ride!

shamrockexpress
registered user
Posts: 382
Joined: Mon Sep 28, 2009 12:44 am
Contact:

Sun Jul 26, 2015 9:56 am

1 x box of bits
1x frame
1x chq book
1x endless hours in the work shop

= 1x very nice scooter...............WELL DONE THAT MAN :) very nice indeed can i have a go Mister.

ipman
registered user
Posts: 157
Joined: Sun Jun 22, 2014 9:48 am
Contact:

Sun Jul 26, 2015 10:32 am

shamrockexpress wrote: 1x chq book
best gp I've seen for a long time,your going to get the odd few getting jealous though :roll:

philcasino1973
registered user
Posts: 95
Joined: Mon May 05, 2014 8:57 pm
Main scooter: lambretta gp200
Contact:

Sun Jul 26, 2015 10:43 am

very nice ....a lovely looking gp
phil

Boreham
registered user
Posts: 162
Joined: Tue Feb 05, 2013 7:58 pm
ebay user ID: rsboreham
Main scooter: GP225
Location: Leicester & Dusseldorf
Contact:

Sun Jul 26, 2015 10:52 am

Cheers, all the work is done by myself, exception of the engine work (Top end by pro porting, the rest a local race engineering workshop)
Great fun to ride, engine dyne is only just over 22bhp but very drivable, with the 5 speed you don't need the high power.

sparklymarkly
registered user
Posts: 336
Joined: Wed Jan 04, 2012 6:33 pm
Main scooter: Lambretta GP
Contact:

Sun Jul 26, 2015 12:22 pm

Very nice indeed - well done.

Norrie Bodge
registered user
Posts: 449
Joined: Thu Oct 25, 2012 2:49 am
Main scooter: 80-P220e/71-GP230/60-S2-Ts-230
Contact:

Sun Jul 26, 2015 12:28 pm

Very smart ;-)

paul d
registered user
Posts: 312
Joined: Thu Jun 30, 2011 10:00 am
Main scooter: T5 172 Tv 240
Location: Galway Ireland
Contact:

Sun Jul 26, 2015 12:32 pm

Great result! I had a bad experience with those tyres though.

Boreham
registered user
Posts: 162
Joined: Tue Feb 05, 2013 7:58 pm
ebay user ID: rsboreham
Main scooter: GP225
Location: Leicester & Dusseldorf
Contact:

Sun Jul 26, 2015 1:18 pm

paul d wrote:Great result! I had a bad experience with those tyres though.
Ive had three sets now, i may have been lucky but never had any issues, all on higher powered Lambrettas and Vespas, great grip in the damp and wet!

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