OP
@worrywort avatar
UTC

Hooked
PX125E
Joined: UTC
Posts: 190
Location: Gravesend, Kent, UK
 
Hooked
@worrywort avatar
PX125E
Joined: UTC
Posts: 190
Location: Gravesend, Kent, UK
UTC quote
Hello.
My mate has a PX125E and he wants me to give it a mild tune up.
I was going to replace the crankshaft and here's my question.

Option 1. Mazzuchelli race crank for £105
Option 2. Tameni standard crank for £92 and I grind the web to increase the timing to the same as the Mazz one.

I'm tempted to do the second one as I would like to have a go. Could I have your advice please?
UTC

Jet Eye Master
PX221 MHR, O tuned PX200, PX125 and some motorbikes
Joined: UTC
Posts: 4599
Location: London UK
 
Jet Eye Master
PX221 MHR, O tuned PX200, PX125 and some motorbikes
Joined: UTC
Posts: 4599
Location: London UK
UTC quote
Option 3. 60mm Mazz crank with 1.5mm base packer and 1.5mm grinding to raise the exhaust port.
OP
@worrywort avatar
UTC

Hooked
PX125E
Joined: UTC
Posts: 190
Location: Gravesend, Kent, UK
 
Hooked
@worrywort avatar
PX125E
Joined: UTC
Posts: 190
Location: Gravesend, Kent, UK
UTC quote
Jack221 wrote:
Option 3. 60mm Mazz crank with 1.5mm base packer and 1.5mm grinding to raise the exhaust port.
Ha. you love them long stroke cranks Jack. Thank you.
@sdjohn avatar
UTC

Johnny Two Tone
'15 GTS300, '86 PX125EFL, '66 VBB, '01 ET4
Joined: UTC
Posts: 8545
Location: San Diego, CA
 
Johnny Two Tone
@sdjohn avatar
'15 GTS300, '86 PX125EFL, '66 VBB, '01 ET4
Joined: UTC
Posts: 8545
Location: San Diego, CA
UTC quote
for 13 pounds I'd just go for the Mazz
UTC

Jet Eye Master
PX221 MHR, O tuned PX200, PX125 and some motorbikes
Joined: UTC
Posts: 4599
Location: London UK
 
Jet Eye Master
PX221 MHR, O tuned PX200, PX125 and some motorbikes
Joined: UTC
Posts: 4599
Location: London UK
UTC quote
worrywort wrote:
Jack221 wrote:
Option 3. 60mm Mazz crank with 1.5mm base packer and 1.5mm grinding to raise the exhaust port.
Ha. you love them long stroke cranks Jack. Thank you.
Because a 60mm crank is an easy way to do porting without doing any
@sdjohn avatar
UTC

Johnny Two Tone
'15 GTS300, '86 PX125EFL, '66 VBB, '01 ET4
Joined: UTC
Posts: 8545
Location: San Diego, CA
 
Johnny Two Tone
@sdjohn avatar
'15 GTS300, '86 PX125EFL, '66 VBB, '01 ET4
Joined: UTC
Posts: 8545
Location: San Diego, CA
UTC quote
Don't doubt Jack, he's seldom wrong...
OP
@worrywort avatar
UTC

Hooked
PX125E
Joined: UTC
Posts: 190
Location: Gravesend, Kent, UK
 
Hooked
@worrywort avatar
PX125E
Joined: UTC
Posts: 190
Location: Gravesend, Kent, UK
UTC quote
Hello sdjohn.
I certainly don't doubt him. I have received a great deal of advice and respect him highly. Way back a hundred posts ago I was doing up my 125 and bought a 60mm crank but had time constraints which made me rebuild it as standard. Jack occasionally gives me a nudge about fitting it.

I've got the Southern Shakedown Rally next Month and then it's rebuild time.
I'm knocking my mates engine out next week which is going to remain a 125.
I put this post up because I want to dremel something.
@sdjohn avatar
UTC

Johnny Two Tone
'15 GTS300, '86 PX125EFL, '66 VBB, '01 ET4
Joined: UTC
Posts: 8545
Location: San Diego, CA
 
Johnny Two Tone
@sdjohn avatar
'15 GTS300, '86 PX125EFL, '66 VBB, '01 ET4
Joined: UTC
Posts: 8545
Location: San Diego, CA
UTC quote
well then, carry on and dremel away! Razz emoticon
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