Derbi GP1 Malossi MHR 70cc

[RiCkY70]

Hi There,

my names Ricky and I work in a scooter tuning shop in Bristol.
This is my 2005 Derbi GP1 racing project.

It started life as a stock 50cc with a bolt on pipe. Then I brought it as the second owner and ended up partly sensing the bore. So then I went and brought a bolt on 70cc kit and ragged it round for the summer the got board of the lack of power and the mass of problems I was having.
so I decided to fully strip the bike down and rebuild it with a malossi mhr rep for i.o.w this year !

also have access to a dyno and full workshop tools so im hopeing to get this to the top peak of mhr rep kits.

i started the project by complety striping it back to the frame. all the wireing came off and it was sanded down and repainted. fresh bearings and bushes. then it come onto the wireing. i striped all the wires back and got rid of all the ones i dont need. elec start. standard clocks, oil sensor etc. made my own loom then heatshrinked it all neat and cabled tied it to the frame.

the mhr kit was the first engine i have built. i built it in work and with some help and advice from the mechanics it was built and i assumed running fine... once fitted in the bike i started it and found it leaking water. once i inspected it closer i found it was leaking from the base gasket and into the engine. not wanting to take short cuts i striped the engine out again and cleaned, re lubed the bearings. got a fresh gasket set and tried again. got it fitted and it ran up to temp fine. toped the water up and was sorted.

then took it into work and straped it on the duno. i had a hard job trying to get the 24mm to work with the motoforce inlet, once started i ran it up and it pulled 10.2 bhp. not amazing but good for a first run. found the carb was spot on at full throttle but boged horable at mid/ low range. tryed a 17.5 and ran up fine. still pulled 10.2 bhp.

when i took it for the first run i had a 110 main jet and 8.2 rollers (stock polini ones) then swaped them for 5.0g rollers and a 95 main jet. added a polini gear up and it pulled just under 12 bhp.

12 bph isnt great for my but is on the boarder line of road scooters in the uk... next on my list is a 25mm dellorto carb and a malossi inlet. iv then got a full day on the duno to try and hit the magic 13.5 - 14 bhp with out a inner roter kit ! once i recive the polini inner roter kit and a few other top spec bits im hopeing to pull 14 bhp with it. this isnt much compared to euro scoots but in the uk it will be one of the top mid race road spec scoots.....

once the engine is done it will be on to he full on custom work. with the stage6 fork. rs24 rear shock combo its going to be low and stiff.

going to go for all blue panels with white inner panels and white wheels, engine case etc. adding a few little bits like blue brake lines. some fiberglassing and it should be a nice ride i hope.

before anyone says why spend so much on this bike. " we have aerox, typhoons, nrgs in the shop every day and every bike is the same. bar conversion scrached panels and a low end sport kit." the last thing i want is a common bike so i thought this would be my best bet for a project !

Ill start the photos/ project from about 5 moths ago. i have hundreds of photos on request.

current spec is: (still to change)
malossi mhr 70cc kit
yasuni r carb edition exhaust
pm tuning full circle crank shaft
skf racing main bearings and seals
motoforce 24mm pwk carb
polini speed control kit
polini Kevlar belt
ngk racing lead and cap
tnt racing derestricted coil pack
Kilser ported straight inlet
Large black stage6 air filter
pm tuningboost bottle
stage 6 racing drive face
polini 3g clutch
stage6 r/t clutch bell
polini gear up kit
lightend fly wheel
stage6 vforce reed block
stage6 carbon fiber reeds


Visual parts: (will be added to)
white str8 handle bars
str8 white stem
brembo brake conversion
tnt tuning blue brake caps
tnt tuning blue brake levers
koso digital Speedo
kill switch
stage 6 oil filler plug
BCD blue/ white grips
stage6 cnc kickstart
str8 blue engine case bolts
"every panel bolt blue"
custom number plate bracket
bike it blue tax disc holder
stage 6 cnc switch gear
stage6 oversize front disc
stage6 rear wavey disc
custom front brake bracket
polished engine
bridgstone tyres
blue str8 dust caps
Malossi rs25 rear shock

Body Panel Work: (still to be changed)

fiberglassed panels
smothed belly panel
seat recoverd with mhr logo
wheels powdercoated white
stand powdercoated white
white powdercoated engine case
full respray in white/ blue
fiberglassed stage6 etg guage


still to come:
stage6 r/t front forks
bcd undertray fiberglassed in
polini inner roter kit
dellorto 25mm carb
malossi vinto inlet
stage6 throttle
stage6 etg guage
stage6 cnc steerier tube
stage6 cnc brake levers
str8 killswitch
underseat fuel tank
pulse lots lots more


heres some pics of what its gone though so far:
(theres allot of them)

[/

IMG]http://i291.photobucket.com/albums/ll318/konabikes_2008/Photo0128.jpg[/IMG]

A few videos:

[ame="http://www.youtube.com/watch?v=8JtKRFSgDK8"]YouTube- malossi mhr[/ame] First run. really rich and tight !

[ame="http://www.youtube.com/watch?v=ucDzJRlGIXs"]YouTube- Malossi MHR - Derbi Gp1[/ame] Second run. 110 main jet

http://tinypic.com/player.php?v=214767o&s=5 first test ride. power wheelie !

http://tinypic.com/player.php?v=24b5kwl&s=5 koso speedo. ( not my bike running)




thanks for looking. updates most weeks !
Ricky

 

[RiCkY70]

25mm dellorto and a malossi mhr viton inlet. little fuel vaccume nipple as well.
also got some stage6 cnc brake levers and a str8 frame mounted killswitch comming tomorrow hopefully.
and going to order a few last tuning bits before i get the panels painted
its finaly getting there now :bunny:

Pics:

 

[jaapio]

what are you planning to buy further? I saw that you were still driving with the standard ignition. Are you planning to replace that or do you wanna keep that?

but your project is really getting shape! really nice job!

 

[RiCkY70]

thanks. yes im eather getting a malossi mhr ignition or a polini one. and other parts im getting are things like stage6 fork legs. the stage6 cnc top crown. blue air filter and some other goodies. still lots more to come

 

[ma11b]

looks good ricky
what condition is ur black air filter?
if its good wanna swap for a white one

 

[SF2B]

Get a C20.

 

[ma11b]

the engine isnt ported so the c20 would be usless on it
a c16 would have been better
but the dyno showed a yasuni r being better

 

[RiCkY70]

yh. from the bikes we have run up with these kits we forun the yasuni r makes more power. but the cylinder is undergoing some "custom" work in a few weeks and a new exhaust will be on the spec sheet

also matt replyed to you on facebook. also got a str8 killswitch hear if your still after one ?

anyway - Update:

New !
stage6 cnc machined brake levers. look :wub: lovley i think :wub:
and a str8 panel mounted killswitch

going to have a dyno sesh saturday i hope. try and get the new carb set up need to match the inlet to it first. :|

 

[ma11b]

save me the killswitch please
should be up on tuesday
and u going for a c16 then ricky

 

[SF2B]

I thought it was a Team.

 

[RiCkY70]

I thought it was a Team.

no sadley not not that high end on this one. will have a new engine next summer though which will constest of a mhr team big bore. but thats a whold new project.......

 

[ma11b]

new engine next summer though which will constest of a mhr team big bore. but thats a whold new project.......

tell me more, tell me more....

might have to up the anti with the mk

btw cheers for the cnc racing drive

 

[RiCkY70]

well when i got the bike. i was aways going to build a 22 + bhp road scooter. the only reason i started it. but after talking wiht people i got advised to go for a mhr rep kit, stage6 kit etc just so i could do some miles on it. so i built this engine.

when this engine is done im planing to get anuther piaggio engine which will have the mhr team on it + all the other goodies... sort of like our zip matt.

then all i got to do is swap between the to engines when ever i want.... spesh next year as i want to try go to a few tracks with it. and see what its like

and then i aways got a spare engine if one brakes lmao. but thats a long way off yet. i need to save some big money for that

and no worries matt i dont think anywere else has them at all lol :S

ill sort that killswitch out for you next week. just got to find the adaptor to fit it to the loom.

 

[ma11b]

well i wanna build a 172 next year
i got a spair set of cases so i might build a midrace

 

[RiCkY70]

Update.....
For the last few months i have been more into my car then the bike. The bikes just been sat in the shop collecting dust and getting touched by every 16 year old in bristol.......

So brought it home saturday and made a list of things to finish. Today got it stripped back down and all the panels off ready for painting. Gave the frame a good clean and hamrited the bits where some surface rust was showing.

Sanded the forks down and painted them silver again. Cleaned them up and re lubed the seals. Re done some bits of wireing which i had rushed before, cable tided it all neat to the frame.

Gave the wheels a clean and polished them using autoglym super resin. Same with the engine case and side stand.
Idles lovley now.

Started first kick with the choke after sitting idle for 4 or so weeks

Going to place a order for a ignition system and a few other bits this week. Also got some stage6 forks which i need to pick up

Heres a few pics. And a vid of the first start:

when i got it home:

Crap Polini filter:

hours later:

New air filter:

25mm Dellorto carb:

Re done some wireing: (Still got to hide brake switch wires)

Intill Stage6 forks are fitted:

First start:
[ame="http://www.youtube.com/watch?v=hlScnG-pI-E"]YouTube - Malossi MHR 70cc - Derbi GP1[/ame]