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GP 125 - TS1 engine. Fully rebuild
Posted: Tue Apr 07, 2015 7:50 am
by FraH2O
Time ago i had problem with my original headlight. One of two pins on reflector is over.

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Not so happy to remove my oem Cev. I searched an exchange reflector...never found it.
Just found a broken casa lambretta with mint reflector.
100 centigrades oven for 4 minutes with open door.
Reflector ready
Second step, the genuine Cev: the glass is ok and in perfect condition.

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Just remove the old sealant and make new. The headlight is now ready and good

Re: GP 125 - TS1 engine. Fully rebuild
Posted: Mon Apr 13, 2015 7:49 am
by FraH2O
Friday sidepanels and drop came back home.
I fit the chrome badge, i'll wait the GP stripes in gloss black to see the overall effect
After i' ve fitting the sidepanels rubber, i put the panels
With seat work better

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Re: GP 125 - TS1 engine. Fully rebuild
Posted: Mon Apr 27, 2015 2:36 pm
by FraH2O
This past week i worked on a friend’ GP 200. We must change all cables
This job help to me to fit my next legshield toolbox (from Vespa Special 50)
Need to remade the upper side of toolbox
I made a paper shape to reweld the cutted piece

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This Sunday i started with frame
Splash plate, side and central standing works fine.
Just fitted the electrical wire, i fitted the rear led light from BGM. The rear smoked light looks fine.
Long range tank genuine look fitted.

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I bought decals in gloss black. I think looks better on black matt body

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Finally the fork and drop fitted. Now I’m readt fo fit cables.

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Re: GP 125 - TS1 engine. Fully rebuild
Posted: Mon Apr 27, 2015 6:06 pm
by T5-190
Looking good, black on black stripes look cool too.
Re: GP 125 - TS1 engine. Fully rebuild
Posted: Mon May 04, 2015 2:28 pm
by FraH2O
:20 pm: engine start! Sounds good
This past week end was very intensive.
I Sealed the my headlight
After I painted the master cylinder, I polished the Yamaha logo.
I’ve changed the nuts of absorber: from normal to pike.

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Friday at 8:00 AM we started to assembly the engine
My girlfriend helped me to made new gasket.
Some engine assembly pics.

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Engine closed at 21 pm
Ready to fit.
Just change the fast flow fuel tap and will be ok. Ignition is 17 degree regulated. After running in will be completed I’ll fit the Kytronic

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I’m so happy!
Re: GP 125 - TS1 engine. Fully rebuild
Posted: Mon May 04, 2015 11:25 pm
by bazza3004
great thread scoot looks fantastic. well done.
Re: GP 125 - TS1 engine. Fully rebuild
Posted: Tue May 05, 2015 6:36 am
by Toddy
Great Job , Great Thread and Pictures, well done

Re: GP 125 - TS1 engine. Fully rebuild
Posted: Thu May 07, 2015 10:28 am
by FraH2O
Thanks to everybody!
Last 3 days were harder to setting
I and my friend have 2 problem to solv.
First was that Delly VHSB doesn’t work good. Very hard to set up. I find on the net some jetting guide.
I try to find new needle, atomiser and main jet. But I didn’t find nothing…dealer (imho) doesn’t want to help me
When I come back I try to fit a Mikuni TMx.
I didn’t start with for these two tips:
- Fuel inlet is on right near to silent block
- Fuel blow has an little eye on right side that bumping on silent block (i hope to expalin right)
Just remove Delly and try to fit TMX.

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Without fuel blow works good
I removed the eye from fuel blow, works fine. The inlet fuel hose is in a right position, no trouble with silent block.

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I clean carb, change jetting and needle (57 needle- 295 main): mikuni seems work fine.
Next post the second trouble.
Re: GP 125 - TS1 engine. Fully rebuild
Posted: Thu May 07, 2015 10:32 am
by FraH2O
The second problem (from last stop 15 years ago): all lights doesn’t work.
First step: we replaced the Regulator. No good
We check flywheel and stator plate
Here the problem.
We reweld the wire and checked all components. All works good and fine.
Re: GP 125 - TS1 engine. Fully rebuild
Posted: Thu May 07, 2015 10:36 am
by FraH2O
Yesterday i finished
The exhaust bracket works fine. No bumping or scratching on sidepanel.

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i think the right keyring.
ready for running in.

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Many thanks to my friend Alberto (stray Runner) that helped my to complete my project, and my girlfriend for her partience.