1997 virago 125 engine upgrade (Scotland / Italy) (CLOSED Info. Provided)

Have a question about fixing something on a Yamaha Virago XV125? Post it here!

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tokhiem
Posts: 1
Joined: Mon Jul 05, 2021 12:34 pm
Location: scotland
What Virago you Own: XV125 1997 Virago

1997 virago 125 engine upgrade (Scotland / Italy) (CLOSED Info. Provided)

Post by tokhiem » Fri Aug 06, 2021 1:07 pm

Has anyone swapped the cylinders and pistons from a 250 to their 125?

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ViragoJoe
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Location: S.E. Michigan, USA
What Virago you Own: 1996 Virago Special XV1100SH

Re: 1997 virago 125 engine upgrade (Scotland) (CLOSED Info. Provided)

Post by ViragoJoe » Fri Aug 06, 2021 2:51 pm

tokhiem wrote:
Fri Aug 06, 2021 1:07 pm
Has anyone swapped the cylinders and pistons from a 250 to their 125?
Tok,

Sorry, I don't think it will work properly even if the pistons and heads bolt right up.

XV250 Stroke (2.6" inch) while the XV125 stroke of 1.85" inch.

(2.6 inch stroke) minus (1.85 inch stroke) equals 0.75 of an inch more travel for the XV250.

The Air Fuel mixture would not compress completely to ignite properly.

1997 XV125 Bore and Stroke is 1.61x1.85 in.

1997 XV250 is Bore and Stroke is 1.93 × 2.6 in.
ViragoJoe 🇺🇸
1996 XV1100SH Virago Special
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AlexPhilip
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Joined: Tue Oct 19, 2021 7:38 am
Location: Italy
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Re: 1997 virago 125 engine upgrade (Scotland / Italy) (CLOSED Info. Provided)

Post by AlexPhilip » Thu Oct 21, 2021 7:41 am

If you're starting out on two wheels then the Yamaha XV125 Virago V-twin is one of the best made little motorbikes you can choose. Reliable motor, solid chassis, nice low seat and wide `bars give a feeling of confident control on the machine. Later XVS125 models have an extra 3bhp in the V-twin motor and the bike is 4kgs lighter than earlier Yamaha XV125 Viragos.

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