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derbi gpr 50/honda 125 project

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conversion kid
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Joined: 12 Jan 2014
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PostPosted: 02:10 - 19 Jan 2014    Post subject: derbi gpr 50/honda 125 project Reply with quote
hi all im new to the site
ive asked for some information on the workshop thread
first off i know my spelling isnt good Thumbs Up Thumbs Up
i got this project 2 weeks ago with the dead engine and wanted
to make somthing Laughing Laughing here is some pictures of how i got it
https://i44.tinypic.com/6nysmg.jpg

i wanted somthing more reliable with abit more bottom end power so i have went with honda cg 125 4 stroke bullit proof engines
https://i40.tinypic.com/1589zs6.jpg
i also wanted to have renthals (sit up and beg) i like the styling and ride postion
https://i43.tinypic.com/n51uvd.jpg
https://i40.tinypic.com/35hmk9g.jpg
https://i39.tinypic.com/2h2e4qv.jpg

i also wanted tho have the exhaust high up like vfr style i will need to make a bracket for back can..... i got a replica xr125r downpipe witch sits behind the frame perfect https://i44.tinypic.com/w7h9gy.jpg
https://i42.tinypic.com/2hqtglt.jpg
https://i41.tinypic.com/15ceul1.jpg
i have only loosly fitted parts to see how it all fits and im happy with it so far...... i have striped it back down and fitting genuine honda loom and switchgear.. engine is painted black in high temp paint and engine moutns on and compleated ill upload som more pic tomorow Thumbs Up Thumbs Up
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BravoCharlie
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PostPosted: 03:09 - 19 Jan 2014    Post subject: Reply with quote
welcome, and good work getting to where you are with it! Thumbs Up

what's the story? first bike? got your license or still on L's?


you've done a good job putting it together, does it run okay?


edit: never saw the text at the bottom telling me you've taken it apart again, sorry!
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c_dug
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PostPosted: 11:24 - 19 Jan 2014    Post subject: Reply with quote
I'm impressed you got it to fit nicely.

Have you checked out insurance for it yet?

If you're going down the modified route and you can insure it I presume you have your full licence? If so why not look at a 150 kit to give it a little more poke?

Might be worth doing the tappets with the engine out too, just for ease of access.
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P.
Red Rocket



Joined: 14 Feb 2008
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PostPosted: 11:30 - 19 Jan 2014    Post subject: Reply with quote
That won't go on the road... DVLA are likely to wanna get it checked over. Swapping from a 2 stroke 50 to a 4 stroke 125, they'll get all panicky about it Laughing
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conversion kid
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Joined: 12 Jan 2014
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PostPosted: 11:43 - 19 Jan 2014    Post subject: Reply with quote
BravoCharlie wrote:
welcome, and good work getting to where you are with it! Thumbs Up

what's the story? first bike? got your license or still on L's?


you've done a good job putting it together, does it run okay?


edit: never saw the text at the bottom telling me you've taken it apart again, sorry!


hi cheers for the reply mate

no this isnt my first bike im 24 years old mate i have a full licence
i build alot of project but never put up on net for anyone to see so i thought id give it a go

yea i took it back apart to fit honda loom paint my engine and complete my front engine mount......the engine is a great runner as i was asured from a goodmate a bike breakers
ill keep goin with pictures in the thread as i do more work today

Thumbs Up Thumbs Up Thumbs Up
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conversion kid
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PostPosted: 11:51 - 19 Jan 2014    Post subject: Reply with quote
c_dug wrote:
I'm impressed you got it to fit nicely.

Have you checked out insurance for it yet?

If you're going down the modified route and you can insure it I presume you have your full licence? If so why not look at a 150 kit to give it a little more poke?

Might be worth doing the tappets with the engine out too, just for ease of access.


hi .. no i havnt checked out insurance details
yes im looking at the 150 kit ...and also the 30mil carb(28mil internal) and unlimted rev cdi...... i checked the valve gaps everything sweet bike had done hardly no miles from breakers Thumbs Up Thumbs Up Thumbs Up
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conversion kid
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PostPosted: 12:36 - 19 Jan 2014    Post subject: Reply with quote
in the man cave for a sunday sesh with the tools Thumbs Up Thumbs Up
heres the first pic of the day me dog in the man cave
https://i40.tinypic.com/28rkxfa.jpg


time to get some work done ill be back with pics
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stevo as b4
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PostPosted: 14:05 - 19 Jan 2014    Post subject: Reply with quote
The good old 2.0 Red top 1.2 Nova's! Laughing
Just like the Fiesta 2.0 Zetec in a base 1.1S or the VVC 1.8's in a Metro 1.1L, and all those MGZR 105's still fitted with rear drums, and a pig iron bodged in 2.0 T16 turbo. Wink

Were any of these conversions ever re-registered properly and declared on the log-book, or were the second hand value's just too good to miss out on?

To the OP, I like the look of those GPR50's, and no doubt at all that the chassis can handle much more than 7-8bhp, but I'd be interested to see how you did the frame mods, and are you replacing the engine cradle afterwards?

What 125cc engine is it out of interest?
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conversion kid
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Joined: 12 Jan 2014
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PostPosted: 15:38 - 19 Jan 2014    Post subject: Reply with quote
im not realy bothed about registering it hahah Thumbs Up Thumbs Up the mounts for this engine are so easy to come by as most import engines are cloned on the old cg.......so i took back mounts out of gy style bike and welded them into mine i have only just finished the front mount need to upload some more pics.......yes i have im going to be welding the frame cradel back in .. i have a spare derbi gpr frame for the metal i need........... i have done other projects here is a video of of a skyjet sj23 125.... that i pimped and put a gohst 250cc engine in it https://youtu.be/KX15TEUzdGk
Thumbs Up Thumbs Up Thumbs Up
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SQL
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PostPosted: 16:04 - 19 Jan 2014    Post subject: Reply with quote
conversion kid wrote:
skyjet sj23 125.... that i pimped and put a gohst 250cc engine in it https://youtu.be/KX15TEUzdGk
Thumbs Up Thumbs Up Thumbs Up



-100 respect for putting a Honda sticker on it*

*Will probably rust less than a honda tho.
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conversion kid
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Joined: 12 Jan 2014
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PostPosted: 16:44 - 19 Jan 2014    Post subject: Reply with quote
SQL wrote:
conversion kid wrote:
skyjet sj23 125.... that i pimped and put a gohst 250cc engine in it https://youtu.be/KX15TEUzdGk
Thumbs Up Thumbs Up Thumbs Up



-100 respect for putting a Honda sticker on it*

*Will probably rust less than a honda tho.


the engine i planned to have in the skyjet was a honda cb250 rs single cylinder twin port engine but the engine needed to much work so i went with the gohst 250 engine
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conversion kid
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PostPosted: 21:11 - 20 Jan 2014    Post subject: Reply with quote
hi all
a little update on the project Very Happy Very Happy
i have now fitted full honda loom and switch gear engine is painted and bolted in Thumbs Up Thumbs Up carb installed heres a couple of pics
https://i40.tinypic.com/14wax4m.jpg
https://i39.tinypic.com/2u8jcrd.jpg
https://i44.tinypic.com/34s3tx2.jpg
https://i41.tinypic.com/123wtnn.jpg

i have also got yzfr 125 rearsets as the derbi ones does not have a gear linkage to the engine
https://i43.tinypic.com/105bnns.jpg[/IMG]

the next job is making this exsaust work they way i like it Thumbs Up Thumbs Up
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conversion kid
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Joined: 12 Jan 2014
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PostPosted: 23:25 - 26 Jan 2014    Post subject: Reply with quote
Another update

ive orded some parts off ebay
first off the sprocket pitch of the cg engine is 428
and the derbi rear sprocket is 420 so ive orded a 17 tooth 420 pitch front sprocket to fit my shaft Thumbs Up Thumbs Up
https://i41.tinypic.com/2ldadm0.jpg
ive also orded front light i like the style
https://i44.tinypic.com/280i4ug.jpg
some new grips and mirrors
https://i40.tinypic.com/mki2ac.jpg
https://i42.tinypic.com/20upicp.jpg

i had it started for the first time today runs great all electrics working as should im happy so far ill up date soon with pictures off custom exhaust downpipe and off new parts fitted hopefully by the end off the week a youtube video of her goin Thumbs Up Thumbs Up
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TUG
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Joined: 12 May 2007
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PostPosted: 23:51 - 26 Jan 2014    Post subject: Reply with quote
How to ruin a bike:
    Buy renthals
    fit alien or enduro headlight or even dominators
    fit wank anodized shit
    big bore exhaust to lose all back pressure
    fit wank carbon copy shit
    repeat until desired effect


I'm sorry but you are ticking all the things I hate the most on custom bikes. You could of left the fairings on and clip ons with maybe some renthal grips and got a better choice in exhaust and it would of looked pretty damn cool. Thumbs Up
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conversion kid
Two Stroke Sniffer



Joined: 12 Jan 2014
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PostPosted: 00:08 - 27 Jan 2014    Post subject: Reply with quote
TUG wrote:
How to ruin a bike:
    Buy renthals
    fit alien or enduro headlight or even dominators
    fit wank anodized shit
    big bore exhaust to lose all back pressure
    fit wank carbon copy shit
    repeat until desired effect


I'm sorry but you are ticking all the things I hate the most on custom bikes. You could of left the fairings on and clip ons with maybe some renthal grips and got a better choice in exhaust and it would of looked pretty damn cool. Thumbs Up


think what you want but this is my bike and ill build it how i like
first off it was missing fairing and the nosecone was cracked to shit
i find the riding postion painfull on my wrists so i changed it!!
thisis a project that i have built out of bits i like the style ive went with and the exhaust is not big bore it was off a yzfr 125 its quite small in person Thumbs Up Thumbs Up
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bladerunner
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PostPosted: 01:04 - 27 Jan 2014    Post subject: Reply with quote
I'd look at getting a 428 rear sprocket rather than 420 Front! It will last a fair bit longer. 420 is moped size chain <7bhp and 428 is 125 4t size <15 bhp........not to say its going to snap if in good condition but it will wear a lot quicker and need changing and need adjusting a lot more often.
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pdg
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PostPosted: 16:49 - 27 Jan 2014    Post subject: Reply with quote
_Iain_ wrote:
Paddy. wrote:
That won't go on the road... DVLA are likely to wanna get it checked over. Swapping from a 2 stroke 50 to a 4 stroke 125, they'll get all panicky about it Laughing


I wouldn't tell them. 125's regged as 50's are worth £££

Plus, it's no worse than declaring say a 1.2-2.0 16v in a Nova - and loads of them made it on the road Thumbs Up

Theres a lad up round here that's got a 172 gillera motor stuffed in a 50 frame, regged as a 50 and riding on L's Laughing


What fantastic advice, you are now my absolute hero.

By the way - it is worse than not declaring an engine swap in a car - car licence is car licence - bike licence is many flavours...
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pdg
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PostPosted: 17:13 - 27 Jan 2014    Post subject: Reply with quote
_Iain_ wrote:
Mk1GSF wrote:
Is that in your professional capacity?


What are you talking about?

You evidently know the grand sum of nothing about my job. I am employed to sell motorcycle parts, and clothing.

I am not a mechanic, DVLA inspector, MOT tester, Bike shop owner, or anything else that would require me to give a toss about what anyone else is riding on what licence.

Shit troll is shit.


That wasn't trolling, that was a valid question in my opinion.

Not giving a shit about someone else choosing to break the law or 'ride otherwise than in accordance with' is a very different situation to actively encouraging that behaviour in the public domain.

Like it or not and whether you sweep the floor or run the workshop, you represent the shop you work in and the owner of that shop. Both in and out of work he has chosen to entrust you with his reputation along with that of his business and other staff.

If you say "don't declare it" then by extension the fact that you represent 'your' shop means they are of the same opinion as you are.

I can think of a few occasions when I've gone into a shop, seen someone working there who I know to be a fuckwit and walked out again, taking my business elsewhere.

Well done. You sir, are a sterling example.
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RhynoCZ
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PostPosted: 17:26 - 27 Jan 2014    Post subject: Reply with quote
Cool project, I'd keep the fairings on. Thumbs Up
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conversion kid
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PostPosted: 18:23 - 27 Jan 2014    Post subject: Reply with quote
RhynoCZ wrote:
Cool project, I'd keep the fairings on. Thumbs Up


yea cheers for the reply fella as i said befor i didnt have the fairing when i got it and the nosecone was smashed ill up here a lil video of it running back can has no bracket yet!!
View My Video

and i with other people would argue on there own project thread Evil or Very Mad Evil or Very Mad Thumbs Up Thumbs Up
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P.
Red Rocket



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PostPosted: 18:26 - 27 Jan 2014    Post subject: Reply with quote
Bye bye melted numberplate Wink
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