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V9A1T large door - 130 cylinder
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@valvitola avatar
ValVitola
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2018 GTV300 SG, 2012 LXV 125ie 2V, 2015 Primavera 3V 150ie and V90
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Good Morning! I have a V9A1T, and I need to replace the original piston. while there I was wondering if I could replace the cylinder with a 130cc or malossi 136cc. If I do that, can I keep the rest stock or do I need new crankshat and carburetor?
Thank you in advance!
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@valvitola avatar
ValVitola
UTC
Hooked
2018 GTV300 SG, 2012 LXV 125ie 2V, 2015 Primavera 3V 150ie and V90
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Location: Guatemala
 
ValVitola
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@valvitola avatar
2018 GTV300 SG, 2012 LXV 125ie 2V, 2015 Primavera 3V 150ie and V90
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Posts: 428
Location: Guatemala
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This is the current Carburator, Dellorto SHB 16/16, do I need to get a 19/19?
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V oodoo
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You already have the longer crank in your V90, but you will want at least the 19 carb and manifold plus a better pipe than stock to take advantage of the new cylinder.
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Moto64
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I think even with the stock pipe you will see a nice bump in power but keep in mind you will not be allowed to ride in some parts of Germany.
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V oodoo
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That's a hi end huge port cylinder. Your case ports are much smaller and you may do as well with a milder Polini or even DR 130 kit, but you will still want the bigger carb even if you start with your stock exhaust.

https://www.sip-scootershop.com/en/product/racing-cylinder-dr-130-cc_10008000

I think the only way to justify that Malossi kit is with a lot of case welding and grinding, bigger carb than a 19 and using that cylinder inlet and a reed valve, a really good pipe, a stronger clutch, probably a racing crank and maybe some gear work too, at least your primaries. Oh, and a hot ignition to match please... CHT & EGT would be a good investment about now too. How's your shocks, brakes and tires???
@swiss1939 avatar
swiss1939
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P208, Stella VMC Stelvio 187, Stella 150, VNX1T, V9A1T, V9B1T, 02 Sportster XLH1208
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swiss1939
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P208, Stella VMC Stelvio 187, Stella 150, VNX1T, V9A1T, V9B1T, 02 Sportster XLH1208
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Lol.
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V oodoo wrote:
That's a hi end huge port cylinder. Your case ports are much smaller and you may do as well with a milder Polini or even DR 130 kit, but you will still want the bigger carb even if you start with your stock exhaust.

https://www.sip-scootershop.com/en/product/racing-cylinder-dr-130-cc_10008000

I think the only way to justify that Malossi kit is with a lot of case welding and grinding, bigger carb than a 19 and using that cylinder inlet and a reed valve, a really good pipe, a stronger clutch, probably a racing crank and maybe some gear work too, at least your primaries. Oh, and a hot ignition to match please... CHT & EGT would be a good investment about now too. How's your shocks, brakes and tires???
What V oodoo said.
+1 on Polini mono or DR with 19.19 carb.
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@valvitola avatar
ValVitola
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Hooked
2018 GTV300 SG, 2012 LXV 125ie 2V, 2015 Primavera 3V 150ie and V90
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Location: Guatemala
 
ValVitola
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@valvitola avatar
2018 GTV300 SG, 2012 LXV 125ie 2V, 2015 Primavera 3V 150ie and V90
Joined: UTC
Posts: 428
Location: Guatemala
UTC quote
You guys are the best! Will buy the DR 130.
I am confused about which crankshaft to get, I need to change the existing one, any recommendations? Any other part that I need to change?
Found this one:
https://www.sip-scootershop.com/en/product/crankshaft-mazzucchelli_45104000
⚠️ Last edited by ValVitola on UTC; edited 1 time
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@valvitola avatar
ValVitola
UTC
Hooked
2018 GTV300 SG, 2012 LXV 125ie 2V, 2015 Primavera 3V 150ie and V90
Joined: UTC
Posts: 428
Location: Guatemala
 
ValVitola
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@valvitola avatar
2018 GTV300 SG, 2012 LXV 125ie 2V, 2015 Primavera 3V 150ie and V90
Joined: UTC
Posts: 428
Location: Guatemala
UTC quote
This Banana exhaust looks nice, nicer than teh Polini
https://www.sip-scootershop.com/en/product/racing-exhaust-sip-road-banana_24169000
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@valvitola avatar
ValVitola
UTC
Hooked
2018 GTV300 SG, 2012 LXV 125ie 2V, 2015 Primavera 3V 150ie and V90
Joined: UTC
Posts: 428
Location: Guatemala
 
ValVitola
Hooked
@valvitola avatar
2018 GTV300 SG, 2012 LXV 125ie 2V, 2015 Primavera 3V 150ie and V90
Joined: UTC
Posts: 428
Location: Guatemala
UTC quote
Found this Carburator Kit
https://www.sip-scootershop.com/en/product/carburettor-kit-sport-shbc-1919_19622800?q=Carburator%20kit%2019

I guess I only need to choose a crankshaft, am I forgetting anything else?
@swiss1939 avatar
swiss1939
UTC
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P208, Stella VMC Stelvio 187, Stella 150, VNX1T, V9A1T, V9B1T, 02 Sportster XLH1208
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swiss1939
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P208, Stella VMC Stelvio 187, Stella 150, VNX1T, V9A1T, V9B1T, 02 Sportster XLH1208
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Bearings, seals since you are in there anyways, plus anything else that's damaged when you open it up.
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@valvitola avatar
ValVitola
UTC
Hooked
2018 GTV300 SG, 2012 LXV 125ie 2V, 2015 Primavera 3V 150ie and V90
Joined: UTC
Posts: 428
Location: Guatemala
 
ValVitola
Hooked
@valvitola avatar
2018 GTV300 SG, 2012 LXV 125ie 2V, 2015 Primavera 3V 150ie and V90
Joined: UTC
Posts: 428
Location: Guatemala
UTC quote
Hope this is my last question before embarking in this. What about primary drives? 22/63 2.86 or 24/72 (3.00)?
https://www.sip-scootershop.com/en/product/gearbox-22-63-286-teeth_15310000?q=Gearbox%2022/63
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