My LC ady can win FZ150i from 0 - 120kph. Still 135cc

Not yet fully optimized. My exhaust system limited my true power, gotta design a custom pipe for myself soon.

let's see what we can squeeze out of a 135cc with stock camshaft, hahaha.


Saran: yes, deepen the valve pocket slightly. I am still using standard gasket.

hi TryX. My pipe design cannot fit yours. The settings on engine are very different.

16/39 too 'heavy'. stock size or bigger than stock rear sprocket is recommended on Penang road.

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Added on June 6, 2009, 12:11 ami actually work on head only. touch nothing on the block. So for your setting (shave block), i rili hv no experience. Theoretically we need no mod from head, but practical wise i dont know.

This post has been edited by charge-n-go: Jun 6 2009, 12:11 AM

Ooops, sorry to hear that.


I can't find. But I have removed the breather hose completely. Not much difference thou.


The difference, depends on which racing block u change
57.0mm (150cc) can feel a bit
58.8mm (158cc) can feel more
60.0mm (166cc) can feel quite a lot

You wanna play engine mod, you gotta spend a lot. changing block alone is not enough.
Just like, u change your computer CPU only, but never increase RAM size, never buy new motherboard, never upgrade PSU, never change graphic card, the improvement is very little.

bizzy, check your bike wiring.

yes, i hate people who takes double lane. I horn them too.

bizzy, js bring ur bike to have a thorough wiring check. I guess some wire may have loosen.

Yeah, let's meet up next month or so.
I need some time to run in 160cc block (58.5mm bore)
I've tried with RGV before with current setup, still lose.
My gear ratio is too wide. I seriously want 6 gears on my bike !!
1st gear ok, 2nd gear onwards further a bit, 3rd gear (80kph onwards).... RGV starting to pull away.


Yes, you will lose some compression.
Perhaps you need to shave more in order to get more compression back

This post has been edited by charge-n-go: Jun 11 2009, 05:09 PM

haha, not yet. my bike still in bee hock. wanted 57mm, but no stock, end up with 58.5mm.
higher compression, as long as no knocking, will increase power in every rpm. In other words, it increases the torque at almost every rpm.


you are using a big carburetor.

Bring to Hong Leong Yamaha and had your carb checked

57mm hard to find nowadays, unless u change to FZ150i original engine. That will cost you about RM500. Mine is ~RM150, 160cc summore.


maintenance expensive if you always speed.


Try Bee Hock and see, he found a TZM carb for that 240cc.

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Added on June 12, 2009, 9:04 amwelcome dude

This post has been edited by charge-n-go: Jun 12 2009, 09:04 AM

yea sure.

haha, that's the cost of engine only, still need to change gasket, engine oil, work on the piston a bit and etc. Today I see the bill, Rm250. Of course, workmanship need to charge la, swap engine takes a lot of effort leh.

160cc + 28mm carb is good.

Now I can use more than 1/2 throttle at low rpm, engine won't blurp. It's because engine creates enough vacuum to suck those air/fuel in... Ooo yea !!

- double post - deleted

This post has been edited by charge-n-go: Jun 13 2009, 03:42 PM

Yea sure. Top speed? I scared
I prefer a 4-stroke for multipurpose ride.
TBH, when I was 13 bek then (more than 10 years ago), I ride illegally on my cousin's 125Z


no knocking sound. Don't need to care about sound nicer la dude, haha.
fuel consumption lower? I don't think so.
While break-in 160cc, fuel consumption is about the same as 135cc, summore mainjet has increased from #120 --> #125. I am very surprised.


I do an oil change after 100km of break-in. The oil is black, lol.
This time I gonna break-in the hard way

This 160cc is awesome, even during break-in. After the oil change, I go for a spin at Balik Pulau, 70% max rpm, half throttle max.
60kph half throttle at 4th gear, can accelerate at uphill !

Seriously I can't remember price for each items that I've bought. What I know is the 160cc engine price, around RM250 (including labour).

The other items like carburetor, racing valve, exhaust pipe, power booster, CDI, engine work (increase compression ratio, port & polish) and etc, I can't remember the price.

Bizzy

If you want a sure-fire method, just follow my mod exactly, but the problem is, the performance that I want may not be the performance that you want... bcoz mine is for 0 - 120kph pickup, not too much on top speed.

Of course, we can sit down and discuss one day during TT session. I'll see what I can help you.

So you want about 170kph.
That is more like top speed already.

My mod can't really apply on yours then, because my target is only 150kph top speed.

The porting, camshaft and sprocket has to be different ady, haha. Same goes to exhaust pipe design.

Yeap, we can do this. There are many many points in between absolute top speed and absolute pickup.

How abt you dude? which one you prefer?

not sure yet. I am busy working, haha. Most likely next weekend
I still using stock camshaft. Waiting for my custom cam.


congrats!


haha, i would like to lowering my cruising speed in Penang. 135cc easily do 100kph (80kph on car speedo).
160cc now.. 110kph seems very easy to maintain, but rpm a bit high.
It seems like 90 - 100kph with the current power curve is the most comfortable.
When the max torque is shifted to higher rpm range, perhaps the cruising speed gets higher.

btw, many new racing CDI has a variable ignition curve. If set at 29 deg advance, the 1st 4000rpm still varies. For eg, 2000rpm @ 10 deg, 3000rpm @ 20 deg, 4000rpm 29 deg all the way up to max rpm.

The most important is do you feel fast. Its your bike.


retard means... there is some serious problem, as standard CDI is damn retard ady.

Variable spark advancement is the best. Every rpm response to different advance degree. Usually more at high rpm and less at lower rpm.

If your CDI is a programmable one. This is only the 1st phase of tuning.
2nd phase is to put the bike on dyno and verify if the degree advancement produced the best torque curve.

For adjustable CDI, we can only fix at one degree. Mine is 29 deg at the moment. The CDI will automatically adjust.
1500rpm - 5 deg
2000rpm - 10 deg
2500rpm - 15 deg
3000rpm - 20 deg
3500rpm - 25 deg
4000rpm - 29 deg
4000rpm and above 29 deg.

Starting from 5 deg until xxx deg that you set, the CDI will try to make a linear graph up to 4000rpm.
It is not very optimized though, but good enough, as I dont have a dyno machine to fine tune. Just use my butt dyno.


are you saying mine is 250cc liao?
I am able to cruise easily at 110kph now, with 160cc engine.
135cc engine easily cruise at 90kph.


Using my current 160cc now.
I try on coastal highway --> Jelutong highway.
throttle open at 1/10, maintaining at 70 - 80kph.
throttle open at 1/8, maintaining at 90 - 100kph.
throttle open at 1/4, maintaining at 110 - 120kph.

I put a range, because it is highly dependant on the wind, haha.
135cc is 10 - 20kph slower than 160cc using the same throttle position.

Normal road I always follow car speed plus 10kph max, lol.


Today I breaking-in for 155km. Why 155km??
That's about my full tank of petrol (used 3.5L).
Morning: Bayan Lepas --> Batu Feringhi --> Teluk Bahang --> Balik Pulau --> Farlim --> Relau --> Bayan Lepas. (110km)
Evening: Just going round and round in Bayan Lepas and Gelugor.

I am doing full throttle max rpm at the whole Teluk Bahang course.
Every traffic light, I play full throttle from gear 1 to 3.
Sometimes also full throttle while going uphill to test the power.
The fuel consumption is amazingly low for an engine which is half way breaking in.

And I won a 125Z standard today at traffic light......
because there are 2 person on the 125Z, lol.
1 on 1, i dunno yet

This post has been edited by charge-n-go: Jun 14 2009, 07:54 PM

The 1st step can change to 15-37 sprocket, but you gotta sacrifice your acceleration a bit to get higher top speed.
However, minor mod can never bring you a lot higher top speed.



I don't care if I win or lose. Just wanna try out.
I guess I can win standard 125Z after installing custom camshaft, slightly enlarged valves and a custom tuned exhaust pipe.

Let's see how it goes when all my mods are done, haha.

This post has been edited by charge-n-go: Jun 14 2009, 08:19 PM