Gilera MXR-> power tuning

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Kic
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Gilera MXR-> power tuning

Post by Kic » Thu Feb 28, 2008 4:14 pm

Hi!

i had bad luck with the crankshaft a few days ago so i decidet to make a full engine rebuild with the maslossi 168cc kit!!, new crankshaft, bearings, gaskets, oil rings/seals, crankcase, cylinder and piston matching/polishing, iriduim spark plug, new drive chain, carburator, air filter, and maybe a new end can.

Some pictures:

Image


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Image Image Image



Image


here are samo pictures of the crankcase porting:


Image Image Image


i need inforamtion about the carburator... the best one for this setup is?

also, will it work properly (in the sence of good mixture) on the olad PHBH 28, and whitch jets shuld be fited?

greetings from croatia!
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gileraXR1
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Carburetor Malossi for Gilera Kit APTS 168cc.

Post by gileraXR1 » Thu Feb 28, 2008 5:45 pm

Hi Kic!
Here two carburetor Dell'Orto setting by Malossi for 168cc. kit:

http://www.malossi.com/Catalogo/Cata_Ma ... rt=1610963
http://www.malossi.com/Catalogo/Cata_Ma ... rt=1610968

Image

Good luck!

Ciao

Marco
Gilera XR1 125 Blue/W
Gilera XR1 125 Red/W
KTM EXC 450
Garelli Vip3 N
Honda CRM 125
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gileraXR1
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PHBH 30 on eBay!

Post by gileraXR1 » Thu Feb 28, 2008 5:55 pm

Hi Kic!
Take a look here on eBay! :wink:

http://cgi.ebay.it/Carburatore-30-PHBH- ... dZViewItem

Ciao

Marco
Gilera XR1 125 Blue/W
Gilera XR1 125 Red/W
KTM EXC 450
Garelli Vip3 N
Honda CRM 125
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Kic
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Post by Kic » Thu Feb 28, 2008 9:20 pm

TNX!

So 30-34 are good, i can get a VHSB 34 from aprilia AF-1 cheep!

It should work!
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oekotopia
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Post by oekotopia » Thu Feb 28, 2008 10:20 pm

:D
Hi,
the diametre of the carb should not be bigger than the
diametre of the inletchannel.
Georg
Trap ist kein Pferdesport
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Kic
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Post by Kic » Wed Mar 05, 2008 9:06 am

update!

decided to leave the stock cylinder!

new piston rings (prox for suzuki RG 250), crankshaft with bearings, side bearings (C4 for the flywheel side, and C3 for the clutch side) originally meant to be C5 and C4 but C5 is tough to find...

also there is a complete set of gaskets and oil seals.

and on top of all roughly about 7 hours of work on porting, polishing and matching...

here are some pics:

Image Image Image Image
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gileraXR1
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Post by gileraXR1 » Wed Mar 05, 2008 9:15 am

Kic wrote:update!

.......crankshaft with bearings, side bearings (C4 for the flywheel side, and C3 for the clutch side) originally meant to be C5 and C4 but C5 is tough to find...
Hi Kic!
If you want I've a new C5........ :wink:
Tell me if you are interested.... :D
Have a nice day, and good job!

Ciao

Marco
Gilera XR1 125 Blue/W
Gilera XR1 125 Red/W
KTM EXC 450
Garelli Vip3 N
Honda CRM 125
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Kic
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Post by Kic » Wed Mar 05, 2008 10:21 am

thanks gileraXR1 :D but i think this configuration (c3/c4) will last longer :wink:
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gileraXR1
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Post by gileraXR1 » Wed Mar 05, 2008 3:28 pm

Kic wrote:thanks gileraXR1 :D but i think this configuration (c3/c4) will last longer :wink:
Hi Kic!
Uhm...... are you sure? *idea*

Why? *SOS*

Thanks a lot! :wink:

Ciao

Marco
Gilera XR1 125 Blue/W
Gilera XR1 125 Red/W
KTM EXC 450
Garelli Vip3 N
Honda CRM 125
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Post by Kic » Wed Mar 05, 2008 3:37 pm

the marking C3/4/5... marks the distance between the bearing rings and the bearing balls, bigger the number -> the clearance is bigger, meaning less friction but shorter life of operation :wink:

hope you understood, sorry for my broken English :oops:
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gileraXR1
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Post by gileraXR1 » Wed Mar 05, 2008 4:05 pm

Kic wrote:the marking C3/4/5... marks the distance between the bearing rings and the bearing balls, bigger the number -> the clearance is bigger, meaning less friction but shorter life of operation :wink: :
Hi Kic!
Ok, that's right, i know the difference between C4 and C5..... and I know about bigger radial clearance between C4 and C5....
Just this: be careful, remember that engine and bearing became hot... red-hot! *deibel*
A different bearing clearance can cause damage in short time at your engine...... *Lollo*
Just this.....

However: C4 on clutch side crankcase and C5 on flywheel side crankcase..... :roll:
Good luck! :wink:
Kic wrote:hope you understood, sorry for my broken English :oops:
You english it's very good! :wink:

Have a nice day! :D

Ciao

Marco
Gilera XR1 125 Blue/W
Gilera XR1 125 Red/W
KTM EXC 450
Garelli Vip3 N
Honda CRM 125
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Kic
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Post by Kic » Wed Mar 05, 2008 4:16 pm

all other 125cc engines (NSR, mito, TZR, rotax, YZ`s) have c3 bearings, never had any problems whit that, gileras have the same conception so doubt i will have any problems here. :wink:
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gileraXR1
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Post by gileraXR1 » Wed Mar 05, 2008 6:27 pm

Hi!
OooooK! :wink:

en. That's right....
it. Va bene! :roll:

Good Job!!!!

Ciao

Marco
Gilera XR1 125 Blue/W
Gilera XR1 125 Red/W
KTM EXC 450
Garelli Vip3 N
Honda CRM 125
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