NOS Minarelli V1 low power

Chris Carleton /

Put on a 15 mm intake and 15.15 carb not much help? Tips? Need 3 hp.

Re: NOS Minarelli V1 low power

What pipe?

Re: NOS Minarelli V1 low power

Chris Carleton /

Stock type no expansion.

Re: NOS Minarelli V1 low power

You won’t get any significant improvements with a new carb and filter. Without a performance pipe, your efforts will fail.

Even a stock v1 Pancake exhaust would be an improvement, but you really should go with a good performance pipe if you really want to notice a difference.

Re: NOS Minarelli V1 low power

Also, it’s worth noting that even a NOS motor has 40+ year old crank seals. That rubber still gets hard and brittle on the shelf, so I’d replace them. You may have an air leak as well.

Re: NOS Minarelli V1 low power

Dirty30 Dillon /

NOS or not, it could also be a slow-port model in which case it will be slow. until you change the displacement and/or porting.

Re: NOS Minarelli V1 low power

Putting a bigger carb on without porting the intake and the jug will get you nowhere. My stock V1 was the 19mph model, and the intake port was smaller than a dime.

After porting, 16mm carb, home built pipe, and a 36t sprocket, it did 40mph, but took 1/2 mile to get there. You could walk faster than it off the line.

Best advice is get a polini kit. Instant 5hp, according to specs. A small price to pay for more power.

Re: NOS Minarelli V1 low power

>>>taykoff [s2m] /

Solid advice from everyone here.

Not sure about the desire for 3hp, but you already have the 15.15 (assuming dell SHA) carb, eh? Read the MA history lessons for v1's.....or take the short cut:

Port that stock cylinder intake to match and taper that down to the port window. Raise your exhaust port window 1 mm, widen 2 mm (1 mm each side). Lower your intake port window a smidge (technical language). Grab a cheap tomos techno bullet pipe, hack and weld to fit, then match your exhaust port to the pipe and taper that down to the exhaust window. Even with stock gearing (assuming 10 x 44) you will be in the 35-40 mph range and blast off the line with this recipe (assuming your wheel bearings aren't garbage, your chain isn't rusted, yada yada, and so forth.)

Have fun!

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