PGM-FI Controller for first generation PCX150 (KF12)

BPT7594 · Post by **BPT7594** » Wed Dec 02, 2015 7:30 pm

I also heard about switching to an electric coolant pump from Bosch. My friends who race the Sniper MX King 150 from Yamaha do this all the time, the mechanical pump on our Honda engine is pretty much the same, which uses the camshaft to turn the pump if I'm correct. Switching to an electric pump from Bosch would free some HP trying to pull the pump and be safer too, since the electric pump is always on, at least that's the theory, my friends have not run into any trouble doing this. What's your opinion guys?

Pcxdemon · Post by **Pcxdemon** » Wed Dec 02, 2015 8:28 pm

So what's a stock cam clearance? I'll post takegawa cam clearance once I get back home..
I like the idea of electric pump, it's been on my mind for a while now...
Also to think about is a Forza throttle body 34mm in size. It has dual cable operation but it's compatible with newer Pcx models that operate dual throttle cables. Chameleon on webike sells 34mm intake manifold to match Pcx head..

BPT7594 · Post by **BPT7594** » Wed Dec 02, 2015 10:16 pm

Stock cam clearance is in the PCX manual I think. I don't have that on hands. Have to search a little. My mech said it's about 0.1mm for IN. But let's trust Honda.
I'll look into the electric pump idea. I can find a bosch pump pretty easily in VN. For drag racing that's a must. It can put more stress on the battery but I'll get a better battery anyway.
About the 34mm I'm not too sure it'll be right for less than 180c kits.
Reggy has in stock the max stroke crankshaft ready to go at any moment, but he lacks the cylinder to go with it. One can insert a metal spacer at the base of the cylinder but Reggy said going that way would cause problems with the cam chain tensioner, not sure I fully understand that. Yuminashi don't have the matching cylinder right now so I guess it's not an option. If you install that crankshaft then yeah 34mm TB manifold would be insane. Their cranshaft is cheap too. About 350$ for a Yuminashi commitment.

Pcxdemon · Post by **Pcxdemon** » Wed Dec 02, 2015 11:32 pm

Oyabun,i will get back to you shortly with Takegawa headgasket thicknes..

Sorry for delay,im just too busy to remember everything at once,but it all comes to me eventually...

BPT7594 · Post by **BPT7594** » Thu Dec 03, 2015 2:00 am

The valve clearance for PCX/Click 125i is 0.1mm IN and 0.24 EX. way more than what Yuminashi suggested. WAY more. double for IN and triple for EX.
I guess I'll trust Honda on this, but if anything goes wrong, I'll change it to what Reggy suggested.
When I have everything I need, I'll make a new post, call it Project C164 haha

Oyabun · Post by **Oyabun** » Thu Dec 03, 2015 9:21 am

Could it be that the smaller numbers are given in inches?

Oyabun · Post by **Oyabun** » Thu Dec 03, 2015 9:27 am

BPT7594 wrote:I also heard about switching to an electric coolant pump from Bosch. My friends who race the Sniper MX King 150 from Yamaha do this all the time, the mechanical pump on our Honda engine is pretty much the same, which uses the camshaft to turn the pump if I'm correct. Switching to an electric pump from Bosch would free some HP trying to pull the pump and be safer too, since the electric pump is always on, at least that's the theory, my friends have not run into any trouble doing this. What's your opinion guys?

I was actually thinking of an electric radiator fan too. That buried fan can easily rob up to 1.5 hp at high rpm and it is not exactly aligned to operation profile either. Sitting in heavy traffic in hot weather with low rpm it might move too small amount of air while at higher speeds where adequate flow is available it might provide too much cooling.

BPT
Can you post a link to a bosch pump used by your friend?

BPT7594 · Post by **BPT7594** » Thu Dec 03, 2015 10:14 am

We use this one. The link is a vietnamese shop but you get the idea, there's an image also.
If you know what you're doing it's a great update, but definitely will have to do some CNC mod to get it on there.
http://www.shopp1.com/prodetail-195-226 ... RMANY.html

I figure if you want to be simple just get the yuminashi 1.6 bar cap, much easier. But if you can upgrade to this and the electric pump then you got nothing to really worry about anymore.
Here is a picture of the Bosch pump with some part numbers on it, might be easier for you.

: 10349972_726768114069927_867722768769767495_n.jpg (87.59 KiB) Viewed 2626 times

I'm pretty sure Reggy meant it to be in mm, not inches, he's dutch for once and he did use the "mm" unit. 0.05mm and 0.08mm, he said it's old Honda specs.

I have confidence in my mechanic so I think valve clearance is easy to change.

nedla · Post by **nedla** » Thu Dec 03, 2015 11:50 am

hi Vlad

do we spray the copper spray on both sides of the copper gasket?
what will happen if don't use copper spray?
and do we spray it to the cylinder gasket too?

Oyabun · Post by **Oyabun** » Thu Dec 03, 2015 2:45 pm

Interestingly the only spray able copper sealant I've found is from permatex and in spite it is marketed as high temp sealant the max temperature it can whitstand is 260degC. Is this the type you are talking about?

BPT7594 · Post by **BPT7594** » Thu Dec 03, 2015 6:07 pm

The head can only get that hot so it's understandable. More than 120 degrees C and you lose your coolant and bent the head. Permatex does have higher temp but it's for exhaust. I think it can endure 540 degrees C. Only it's not copper spray and it's for sealing holes in your exhaust. I used to have a leaking SBK carbon 2011 from LeoVince, I got it for fixing, good stuff, but it's a mess and not very sophisticated.

Pcxdemon · Post by **Pcxdemon** » Fri Dec 04, 2015 10:17 am

Takegawa headgasket thickness is .6mm, or .2mm separated per piece.
Also cam valve clearance is .1 IN and .24 EX +-2mm

BPT7594 · Post by **BPT7594** » Fri Dec 04, 2015 11:23 am

Pcxdemon wrote:Takegawa headgasket thickness is .6mm, or .2mm separated per piece.
Also cam valve clearance is .1 IN and .24 EX +-2mm

That's stock valve clearance. Did you solve the unmatched exhaust header yet?

Pcxdemon · Post by **Pcxdemon** » Fri Dec 04, 2015 6:10 pm

http://i1228.photobucket.com/albums/ee4 ... fkprnk.jpg

Pcxdemon · Post by **Pcxdemon** » Fri Dec 04, 2015 6:10 pm

http://i1228.photobucket.com/albums/ee4 ... 400ckn.jpg

Pcxdemon · Post by **Pcxdemon** » Fri Dec 04, 2015 6:11 pm

http://i1228.photobucket.com/albums/ee4 ... hwyevh.jpg

Pcxdemon · Post by **Pcxdemon** » Fri Dec 04, 2015 6:12 pm

http://i1228.photobucket.com/albums/ee4 ... d7dns1.jpg

Pcxdemon · Post by **Pcxdemon** » Fri Dec 04, 2015 6:15 pm

Sorry, I've tried adding word description with links and I've tried 5 times in the row but after I tried to submit it just kept signing me out and looses all the work... So frustrated!

BPT7594 · Post by **BPT7594** » Sat Dec 05, 2015 2:34 am

Great work.
By the way, do you happen to have installed a gear ratio reduction set either from Kitaco (51 teeth) or Yuminashi (15/45 teeth) Vlad?
My friend installed one today with a performance vario and he noticed it kind of "howl" a little, I told him it's breaking in and it should be fine but he kinda worry. He installed it on a PCX 125 esp by the way. The old gear ratio is (53/17) x (44/13) , the old PCX version 1 is (53/17) x (47/13). He installed the Kitaco gear so I think his ratio is now (51/17) x (44/13). In my book there should not be a problem because the Kitaco gear although mentioned to be installed on a PCX V1, still goes hand in hand with a 17 teeth counter gear as in it replaces a 53 gear to go with a 17 gear. Should he worry? I told him to break in for about 300km and change the final drive oil to see better.

Pcxdemon · Post by **Pcxdemon** » Sat Dec 05, 2015 4:55 am

Yea, I got kitaco gear and 150 gearing installed. I got no dramas with it. It's quiet and works well...
Not sure what to tell you about your mates problems..

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PGM-FI Controller for first generation PCX150 (KF12)

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