2.55 primary + Zirri short 4th...

[KTy]

Alloha GSF guys ;)

As some may know I have a nice 50 special with a highly tuned Polini 133 engine, 2.55 straight primary, big admission (like BodyBuidingGym :) ), and zirri silent pipe.

I'm in the process of opening my engine to change my primary with the GSF primary repair kit (soon available, right ? ;) ) but also because I have some welding to be done. I think it is also the opportunity to maybe change my standard 4th gear for a zirri short...if it's worth it (yeah, because it's nevertheless ~200euros... )...

The bike is exclusively a fun-bike, not a kilometers road monster...

Please, give me your opinion !

(And if you have a sweet deal on a Zirri short, please, let me know :) )

KTy

[amazombi]

Alloha GSF guys ;)

As some may know I have a nice 50 special with a highly tuned Polini 133 engine, 2.55 straight primary, big admission (like BodyBuidingGym :) ), and zirri silent pipe.

I'm in the process of opening my engine to change my primary with the GSF primary repair kit (soon available, right ? ;) ) but also because I have some welding to be done. I think it is also the opportunity to maybe change my standard 4th gear for a zirri short...if it's worth it (yeah, because it's nevertheless ~200euros... )...

The bike is exclusively a fun-bike, not a kilometers road monster...

Please, give me your opinion !

(And if you have a sweet deal on a Zirri short, please, let me know :) )

KTy

<{POST_SNAPBACK}>

I have the zirri 4th in one of my engines, in combination with the 2,34 primary drive, and i definitely think it's a good idea. the taller primary gear reduces torque on the clutch (which certainly has a hard time if you're anywhere near the output of bbg) while overall ratio remains roughly unaltered to what you have at the moment. with 3rd closer to fourth you also gain an extra speed for "fast" riding on b-roads. with third reaching up to 110 or 115 it definitely is a usefull option for passing slower verhicles, much more so than standard 3 and 4 (where i have always found 3rd to be something to go through to get to fourth only).

so that's a definite yes from my side. the money is the only drawback i can think of.

[KTy]

I have the zirri 4th in one of my engines, in combination with the 2,34 primary drive, and i definitely think it's a good idea. the taller primary gear reduces torque on the clutch (which certainly has a hard time if you're anywhere near the output of bbg) while overall ratio remains roughly unaltered to what you have at the moment. with 3rd closer to fourth you also gain an extra speed for "fast" riding on b-roads. with third reaching up to 110 or 115 it definitely is a usefull option for passing slower verhicles, much more so than standard 3 and 4 (where i have always found 3rd to be something to go through to get to fourth only).

so that's a definite yes from my side. the money is the only drawback i can think of.

<{POST_SNAPBACK}>

Yeah, I have already the 2.34 primary in stock... I only need the short 4th... (