125cc > 168cc tuning kit by Malossi
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- gileramad
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125cc > 168cc tuning kit by Malossi
One question always asked is if there are any stock tuning kits for the Gilera 125cc engines.
The answer is yes and no - there seem to be different kits by Malossi and Polini for the older engines with the intake in the cylinder (ER/RRT/Fast Bike/KK/KZ etc.) and no kits for the newer engines (SP02/Crono/CX/etc.).
I bought a CVF II Kit made by Malossi on Ebay-Italy and took some photos:
The data:
Compression: 14,8:1
Max power: 31,15 CV @ 8250
Max torque: 2,4 kgm @ 7250
Besides mounting the new Cylinder you have to work on the APTS Power Valve wich is to be made a bit bigger, change 2 clutch springs with the enforced ones in the kit and adjust the Power Valve, your Carburetor set-up and timing.
The kit is still in Malossi´s catalogue but i don´t know if they still ship it. Gottfried already said he´ll try to get some...
The answer is yes and no - there seem to be different kits by Malossi and Polini for the older engines with the intake in the cylinder (ER/RRT/Fast Bike/KK/KZ etc.) and no kits for the newer engines (SP02/Crono/CX/etc.).
I bought a CVF II Kit made by Malossi on Ebay-Italy and took some photos:
The data:
Compression: 14,8:1
Max power: 31,15 CV @ 8250
Max torque: 2,4 kgm @ 7250
Besides mounting the new Cylinder you have to work on the APTS Power Valve wich is to be made a bit bigger, change 2 clutch springs with the enforced ones in the kit and adjust the Power Valve, your Carburetor set-up and timing.
The kit is still in Malossi´s catalogue but i don´t know if they still ship it. Gottfried already said he´ll try to get some...
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- Angstbremser
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Re: 125cc > 168cc tuning kit by Malossi
Gileramad suggested that there were no kits for the newer engines (SP02/Crono/CX/etc.).
I have just added a 1993 2500km unmarked GFR to my collection.
Looking around the web I found this page where a guy has used a 160 Polini kit to get 40cv and speeds of 200km/hr from his GFR. Have a look at his page at http://www2.motorino.it/miomotorino/vedi.php/554.html
Does this mean the GFR is the older engine?
Anyway I have only ridden mine once so no mods planned yet!
Ciao a tutti,
Nick
I have just added a 1993 2500km unmarked GFR to my collection.
Looking around the web I found this page where a guy has used a 160 Polini kit to get 40cv and speeds of 200km/hr from his GFR. Have a look at his page at http://www2.motorino.it/miomotorino/vedi.php/554.html
Does this mean the GFR is the older engine?
Anyway I have only ridden mine once so no mods planned yet!
Ciao a tutti,
Nick
RC600C,Nordwest 350,Nordwest 600 X2, Saturno,GFR 125,RS 50 Trial
- gileramad
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Looks like they sell a tuned 125cc motor at Ebay.it ->(c)lick here
Re: 125cc > 168cc tuning kit by Malossi
Hy, I also bought that kit and installed it but as I dont know itallian I didn't modificat APTS bicause instructions are in itallian so if anybody knows or is willing to translate following text or explain it I would appreciategileramad wrote: Besides mounting the new Cylinder you have to work on the APTS Power Valve wich is to be made a bit bigger, change 2 clutch springs with the enforced ones in the kit and adjust the Power Valve, your Carburetor set-up and timing..
MODIFICHE VALVOLA APTS
Per ottenere le prestazioni ottimali e’ indispensabile raccordare la valvola parzializzatrice al condotto di scarico del nuovocilindro asportando le zone tratteggiate Indicate nel seguente schema. L'intervento puo' essere effettuato impiegando sia una pistola smerigli atrice pneumatica che una serie di lime adate all 'asportazione del materiale in eccedenza. Per raccordare correttamente il profilo della valvola inserire quest’ultima nell’apposita sede del nuovo cilindro disponendola in modo che il condotto di scarico risulti completamente aperto;tracciare quindi sulla valvola stessa il profilo del materiale in eccedenza da asportare. Durante le fasi di lavorazione fare attenzione a non modificare altre superfici che non corrispondano a quelle tratteggiate in figura. Rifinire con cura le superfici lavorate e lavare la valvola stessa con benzina prIma del montaggio
Allso if anybody knows how to adjust Dellorto PHBH 28 (mixture screw) to explain.
I know I have to modify valve, but can I do that with hand tools and how or it has to be machined? I don't understand this: so that the piston have no any contact.... which piston, contact with what?hahne wrote:You must modfied the outlet-valve!!! ... so that piston have no any contact!! Take a 32 or 35mm-carb.. Bye Gottfried
I would like a bigger carb but I don't know where to buy rubber flange for it, and which model can be fitted on Gilera XR1 ?
Re: 125cc > 168cc tuning kit by Malossi
WOW! I want it!!!!!bded wrote:Hy, I also bought that kit and installed it but as I dont know itallian I didn't modificat APTS bicause instructions are in itallian so if anybody knows or is willing to translate following text or explain it I would appreciategileramad wrote: Besides mounting the new Cylinder you have to work on the APTS Power Valve wich is to be made a bit bigger, change 2 clutch springs with the enforced ones in the kit and adjust the Power Valve, your Carburetor set-up and timing..
MODIFICHE VALVOLA APTS
Per ottenere le prestazioni ottimali e’ indispensabile raccordare la valvola parzializzatrice al condotto di scarico del nuovocilindro asportando le zone tratteggiate Indicate nel seguente schema. L'intervento puo' essere effettuato impiegando sia una pistola smerigli atrice pneumatica che una serie di lime adate all 'asportazione del materiale in eccedenza. Per raccordare correttamente il profilo della valvola inserire quest’ultima nell’apposita sede del nuovo cilindro disponendola in modo che il condotto di scarico risulti completamente aperto;tracciare quindi sulla valvola stessa il profilo del materiale in eccedenza da asportare. Durante le fasi di lavorazione fare attenzione a non modificare altre superfici che non corrispondano a quelle tratteggiate in figura. Rifinire con cura le superfici lavorate e lavare la valvola stessa con benzina prIma del montaggio
Allso if anybody knows how to adjust Dellorto PHBH 28 (mixture screw) to explain.
It's a wonder and powerful engine!
Translation:
APTS VALVE MODIFICATIONS
In order to obtain the optimal performances it's indispensable to join at same level the exaust valve to the exaust of the new cylinder; start to remove material like the outlined zones (look at the draw).
This job can be executed employing a pneumatic gun with a rotary cutter and a set of appropriate rasps (to remove all "surplus" material).
In order to join correctly at same level the profile of the valve and the cylinder, insert valve correctly in new cylinder (open position) and draw the right signs by a permanent pen.
Make attention! no modify other parts of new cylinder (just outlined in figure).
Polish with care all new modify surface and wash it with fuel before assembly it.
Good job!
Marco
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