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Re: Pcx Yuminashi Chainsaw 164!
Posted: Fri Jan 15, 2016 3:37 am
by Pcxdemon
Re: Pcx Yuminashi Chainsaw 164!
Posted: Fri Jan 15, 2016 3:59 am
by waspmike
i think you might need 20 posts or something before you can send anyone a PM.
They are called "bushing" they have to be pressed into the pulley half.
let me know if you have any problems.
Re: Pcx Yuminashi Chainsaw 164!
Posted: Mon Jan 25, 2016 6:22 pm
by sergiopatron
Got the jcosta ready and installed the 44T final gear... On the first run with the stock vario it felt very fast but it still reads 108 before the rev limiter kicks in.... Lately when im crusing at 80 and open the throttle theres a power loss feels the engine is ideling?? Wrong AFR ratio? Any ideas?
Re: Pcx Yuminashi Chainsaw 164!
Posted: Thu Feb 04, 2016 4:25 pm
by lolofigo
sergiopatron wrote:Got the jcosta ready and installed the 44T final gear... On the first run with the stock vario it felt very fast but it still reads 108 before the rev limiter kicks in.... Lately when im crusing at 80 and open the throttle theres a power loss feels the engine is ideling?? Wrong AFR ratio? Any ideas?
Re: Pcx Yuminashi Chainsaw 164!
Posted: Thu Feb 04, 2016 4:29 pm
by lolofigo
Hi I'm thinking about changing final gear to 44t sprocket from yuminashi. It says on their website that 45/15 set requires longer speed sensor but nothing about 44t sprocket. Anyone has any experience with that?
Re: Pcx Yuminashi Chainsaw 164!
Posted: Tue Mar 01, 2016 3:34 pm
by lolofigo
lolofigo wrote:Hi I'm thinking about changing final gear to 44t sprocket from yuminashi. It says on their website that 45/15 set requires longer speed sensor but nothing about 44t sprocket. Anyone has any experience with that?
Well no one responded so I bought it anyway. My findings are:
-sprocket is same diameter but has less teeth so they are bigger and there is more free play in the transmission
-original speed sensor is working well
-better reaction to throttle in speeds over 40 mph
-according to yuminashi speed indicated on the clock is more accurate and speedo shows actual GPS speed but haven't got time to run GPS test
-top speed on original sprocket was 60 mph GPS now is 60 indicated by speedo the same. I think bike has longer gearing but no power to push it over 60 mph.
I guess yuminashi essential kit is going in next
Re: Pcx Yuminashi Chainsaw 164!
Posted: Thu Mar 31, 2016 10:55 am
by proteinsdef
I wondered if anyone had any reliability info on this setup?. I am keen to carry out the mods, but if it needs rebuilding every few thousand miles, I wont bother, especially when the Honda unit is so reliable!
Re: Pcx Yuminashi Chainsaw 164!
Posted: Fri Apr 01, 2016 9:28 am
by BPT7594
proteinsdef wrote:I wondered if anyone had any reliability info on this setup?. I am keen to carry out the mods, but if it needs rebuilding every few thousand miles, I wont bother, especially when the Honda unit is so reliable!
Reliability is good. I have a kit currently on my friend's PCX 2010 that's 11k km and still going strong without any oil leak because of worn rings, overheat or anything like that.
Be sure to change oil more frequently though, because a higher cc engine tends to run hotter overall and oil will lose its quality sooner. I change my oil every 1000km, got a good brand of synthetic oil that's relatively cheap over here.
Re: Pcx Yuminashi Chainsaw 164!
Posted: Sat Apr 02, 2016 10:44 am
by proteinsdef
And is there any issue with them overheating in general? Do you have to modify the cooling system?
Re: Pcx Yuminashi Chainsaw 164!
Posted: Sat Apr 02, 2016 1:19 pm
by lolofigo
Just go for it. For the price of sports exhaust from webike or ebay you'll get completely different bike. Keep old parts if you worried about reliability so you can always come back to old setup but you'll never look back. Big bore kit gives more smiles per gallon for sure.
Re: Pcx Yuminashi Chainsaw 164!
Posted: Mon Apr 04, 2016 7:06 am
by BPT7594
I installed a SH150 cooling fan on my rotor, has a yuminashi 1.6 bar radiator cap coming.
I plan on using a 8 part water 2 part antifreeze coolant mix too.
Or just run plain water. Plain water has the best cooling capacity.
It does run hotter though. Don't expect it to be as cool as stock, especially with the 27/22 valves from stock cylinder head. I'm running 29/23mm valves. Bigger valves and hot cams traditionally mean lower temperature engine.
Re: Pcx Yuminashi Chainsaw 164!
Posted: Thu Apr 07, 2016 6:46 am
by proteinsdef
It just all seems a little gung ho for me and a case of try it and see what happens kind of philosophy. I use the scoot as my main point of transport and need rock solid reliability as well. I don't like the idea of putting in simple water, as in the UK, the block will split straight away as soon as the sign of winter appears.
Might just stick to my basic mods until I can afford the bigger bike for kicks. Thanks for the input though guys.
Re: Pcx Yuminashi Chainsaw 164!
Posted: Fri Apr 08, 2016 11:47 am
by BPT7594
proteinsdef wrote:It just all seems a little gung ho for me and a case of try it and see what happens kind of philosophy. I use the scoot as my main point of transport and need rock solid reliability as well. I don't like the idea of putting in simple water, as in the UK, the block will split straight away as soon as the sign of winter appears.
Might just stick to my basic mods until I can afford the bigger bike for kicks. Thanks for the input though guys.
You can use 5 5 water vs antifreeze.
I'd say spending money on big bore kits is mostly for the sake of fun and tuning.
If you like stock bikes, get a bigger bike. Me I like tuning and fiddling, so I buy big bore kits and try to improve a smaller bike. It's the fun of tuning
Re: Pcx Yuminashi Chainsaw 164!
Posted: Mon May 30, 2016 6:20 pm
by Pcxdemon
Re: Pcx Yuminashi Chainsaw 164!
Posted: Mon May 30, 2016 9:55 pm
by k2apache6.0
Great thread here, loving it. Who knows, maybe I'll try it before years end. Keep the info and impressions coming. BTW there's a 170 Nikasil big bore kit on ebay, no idea who makes it but it's cheap...
http://www.ebay.com/itm/170cc-cylinder- ... zn&vxp=mtr
Re: Pcx Yuminashi Chainsaw 164!
Posted: Tue May 31, 2016 12:01 am
by Pcxdemon
I like yuminashi 60mm cylinder because it has more meat between burning chamber and a water ports. It's less prone to have a failed Headgasket. I feel that 170cc or 61mm bore is too thin to take a chance. Besides power between the two is same.
Re: Pcx Yuminashi Chainsaw 164!
Posted: Tue May 31, 2016 12:59 am
by Pcxdemon
Variators from left to right: yuminashi, mfr2, Daytona and takegawa
http://i1228.photobucket.com/albums/ee4 ... 3qtotd.jpg
You can see yuminashi where rollers/sliders use all of ramp profile others never really do..
http://i1228.photobucket.com/albums/ee4 ... meqb70.jpg
http://i1228.photobucket.com/albums/ee4 ... e7iwyy.jpg
http://i1228.photobucket.com/albums/ee4 ... 43i6dn.jpg
http://i1228.photobucket.com/albums/ee4 ... heodji.jpg
Also check out yuminashi design where it gets super close to outer pulley because of the milled centre enabling to push the belt right up for increased top speed...
http://i1228.photobucket.com/albums/ee4 ... inhthk.jpg
Re: Pcx Yuminashi Chainsaw 164!
Posted: Fri Oct 09, 2020 8:18 am
by Srazo
Reaper wrote:Hello, mates!
How is your cam performing, Mgalutia88 ? Do you feel the income?
I am waiting for the parcel with the 190cc whole kit from RZracing, it will arrive day to day.. I feel nervous, don't know am I right to mess with modding..
Hope everything will go right and smooth..
Can you direct me to where I can find the rzracing 190cc kit you purchased? I can not find the site, possibly because I'm in the US maybe? Any help would be great.
Re: Pcx Yuminashi Chainsaw 164!
Posted: Fri Oct 09, 2020 10:07 am
by WhiteNoise
Hi Srazo, I see you've requested some info from member Pcxdemon. I also see that his last post on this thread was 2016. And I also see that you only have 1 post on our forum(s).
As per forum rules, a member needs at least 15 posts before they can send a PM (private message),
I encourage you to keep on posting so that feature can become yours
WAIT!! Some Good news! I went ahead and pm'd Pcxdemon for you and pointed him to this thread. In the meantime go on and cruise around, enjoy a bit of chatting - while we wait for His return.
Oh, here's something you can do for the Forum (haha, and just when you thought it was That easy
)
We'd like you to add your location to your profile. I have easy directions posted below to guide you. Adding that wee piece of info will help us to help you, now and in the future. Seems we always have questions...right?
Shout-out to Pcxdemon......can you hear me now????
Re: Pcx Yuminashi Chainsaw 164!
Posted: Mon Oct 19, 2020 5:33 pm
by Pcxdemon
Im Here!!
My advice is to get the Takegawa kit from webike, forza 300 throttle body from partzilla site(chameleon throttle body to head manifold on webike site), exhaust (takegawa from webike again), mfr sports 2 variator with 14degree face pulley and mfr stiff clutch side spring and last but not least a bigger injector (i think mine has 6 holes) from yuminashi..
with takegawa kit, separate the headgasket as its tripple layered and from experience lowers compression too much but does keep the temps slightly cooler though but performance suffer. I just use single layer of the gasket and its spot on compression as performance response is on point,temps slightly higher but ok and never give me issues. My water temp sits on 88-89c riding and 92-93c ideling at traffic lights. anything bellow 95 is sweet. Trouble starts 100c plus. Oh and get the 1.6bar radiator cap..
Gotta run,running late..
thanks white noise..
