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Yuminashi mods
Posted: Mon Mar 31, 2014 11:48 am
by Pgill
Hi
Back in Febuary, I converted my wife's Pcx to 164cc, using Yuninashi pieces from RZ Racing in Holland, after removing the engine, quite straight forward, I replaced the barrel, piston, cam, fuel injector, valve springs, and the variator, and a K&N filter, I stopped short of replacing the throttle body and exhaust.
What a marked difference, managed an indicated 80 mph rock steady!
Now have to run with the idle switch off, as the new cam does not have the decompression cam on it, it does not start instantly,
Spent about £550, well worth it!!!
Paul.
Re: Yuminashi mods
Posted: Mon Mar 31, 2014 12:29 pm
by dasshreddar
welcome,

awesome... any pics?
I assume your in the UK with a 125 non esp?
Re: Yuminashi mods
Posted: Mon Mar 31, 2014 12:48 pm
by Alibally
Mmmm. Valve springs......
Re: Yuminashi mods
Posted: Mon Mar 31, 2014 2:49 pm
by Pgill
Hi
Yep a non ESP, the quality of the Yuminashi is of a high standard, everything fitted well, while the head was off I took the opertunity to polish the inlet & exhaust ports, may only give a whif of an extra horse, but I enjoyed doing it!
Paul
Re: Yuminashi mods
Posted: Mon Mar 31, 2014 3:51 pm
by you you
Pgill wrote:Hi
Yep a non ESP, the quality of the Yuminashi is of a high standard, everything fitted well, while the head was off I took the opertunity to polish the inlet & exhaust ports, may only give a whif of an extra horse, but I enjoyed doing it!
Paul
I only smooth inlets and but polish exhaust ports
Re: Yuminashi mods
Posted: Mon Mar 31, 2014 4:11 pm
by Pgill
Hi
Yes am in the UK, Caerphilly, S Wales
Paul
Re: Yuminashi mods
Posted: Wed Aug 20, 2014 7:21 am
by iceman
I'm impressed by the knowledge and mechanical skill of all those that attempt such things. So far I've checked the oil once

Re: Yuminashi mods
Posted: Fri Oct 03, 2014 7:34 pm
by Pcxdemon
Pgill wrote:Hi
Back in Febuary, I converted my wife's Pcx to 164cc, using Yuninashi pieces from RZ Racing in Holland, after removing the engine, quite straight forward, I replaced the barrel, piston, cam, fuel injector, valve springs, and the variator, and a K&N filter, I stopped short of replacing the throttle body and exhaust.
What a marked difference, managed an indicated 80 mph rock steady!
Now have to run with the idle switch off, as the new cam does not have the decompression cam on it, it does not start instantly,
Spent about £550, well worth it!!!
Paul.
How is this still going?