Monday, June 18, 2007

Rehealing My Scooter

Saturday, June 16, 2007, I want to tune my scooter torque power. The reason is, after what happen to my scooter a few weeks ago, my scooter torque power has been down grade. And that make more stress on me if I'm facing the heavy traffic. My scooter become so slow when I want to accelerate.

The valve is correct, air mixture is correct. What is the problem then?

I think the carburetor throttle valve spring that too hard. The result is the throttle valve always to late to respond, because it can not push the spring higher.

It is time to work!!!

Open the baggage with the key, and open the carburetor maintenance cover inside the baggage using screwdriver. Remove two screw on top of the carburetor that hold the vacuum parts. Remove the metal parts. Now I can see the spring. I take out the spring and measure it. Now I must press it and lowering the spring tension.


Plug the spring and replace all of the parts that I had been removed it before.

Now the test begin.

Turn on the scooter and wait until the auto choke stop to operate. I open the throttle and hear the engine roar. Yes this is what I want.

Engine OK, now time to moving on the front brake. My scooter had a problem on the front brake that always making a noise like a rat. I hate that. Remove the two bolt that hold the brake and remove the L-bolt that hold the brake shoe. I check again and again the piston mechanism, nothing wrong with it. I pull the front brake handle lever, and it OK too. It take so much time to figure it out what's wrong with thw brake. The brake suspension like mechanism is OK. But when I look closely to the bar suspension, I can see that the suspension and the brake pad has adhere. I test it whether this is the problem or not. Yes, I found it, this is the problem. I take out the abrasive steel to cut out a couple of micrometer. After the process is done, I put everything together and see my scooter front brake mechanism. Yes it work.

I open garage and run my scooter on the street. Yeah, everything work perfectly. I feel very comfort with my scooter condition right now.

Sunday, June 17, 2007, I check the horn sound. I sense it not alright with the sound, I must fix it. Open the seven screw that hold the shield, and remove the shield from it location. I see that there is a cable that stick together with the horn, and that makes the horn can not vibrating correctly. So I move the cable to the proper place, so it will not disturbing the horn again. I test it and it sound great.

I plug the shield and put all of the screw to it place. My scooter is in the best condition now, except the air filter that need to be cleaned. I don't have any compressor, so I can not clean it by my selves. May be next time I will bring the filter to the workshop just to clean it out.

Monday, June 11, 2007

Setup The Valve

Sunday, June 10, 2007, I go to my friend. I want him to check my scooter valve, I though something wrong with it. I promise to him at 5 pm I will arrive to the meet point.

I said hello to him. He is so warm, he accept me as his old friend. He heard all of my scooter problem, and he promise that he will check it later after he pack some stuff.

7 pm, he check the valve and tune it to the proper set. He said that the out valve too tight, and the in valve is correct. But he want to make sure. So he check it again and again, almost 4 times. Yeah this is what I like from him, he is so thorough. He set my carburetor again just to make sure.

Finished. He ask me to test it whether I like it or not.

Wear a jacket and helmet, I turn on my scooter, and run it. I run it a little bit hard.

First test is the acceleration and then mid power, and the last is top speed.

There is a lack of power on the acceleration, I don't like it. But the mid power was great. I though the roller combination must be set again from the beginning. I can not get the top speed on this road, because the path is reaching it end, only 80kmh. But I think the top power isn't good. So I get back to my friend to tell the result.

He said that I must replace the intake manifold to the original. Because he think that there is a leak on the air intake, and that make the air mixture become too much. But I said that I have check the intake and I don't sense any leak. He check the intake thoroughly. and he found out there is a leak. I look into it and check it together with him. There is a voice of wind came out from the carburetor.

We found it! The leakage was on the auto choke.

I said that the auto choke was expensive, so I wouldn't replace it with the new one. I must figure it how to make that leak disappear. I think some sealant would be the right answer of this.

Finished will all of this, I say thank you and goodbye to him. And I run my scooter to home.

Monday, June 11, 2007, I wake up at 5 am and prepare some tools. Remove the baggage and look deep into the auto choke. Open the two screw and remove the auto choke from it place. I see a plate that hold the auto choke, I flatten the plate and plug the auto choke to the proper place. Tighten the scew and test the result. I shake the auto choke if it shaky or not. Yes, I don't sense any movement from the auto choke while I shake it.

Turn on the engine and test if it work or not. I tried to hear any voice came out from the carburetor. Nothing! So the problem solved. Yeah, I'm so happy about this.

Packup the tools and get ready to go to the office.

At 6.15 am, I ride my scooter to the office with a normal riding style. Still, there is a lack of power on the acceleration. But this is better than yesterday. Mid power was great, I can feel it until top power. I can get 80kmh easily, but I can not get the top speed because of the traffic condition. Well, I'm pretty satisfied for my scooter condition now. Next time, I must set the roller combination again to get a better acceleration.

Monday, June 04, 2007

Green Is Back In Business

Friday, June 1, 2007, I think I know the problem. The problem was on the carburetor, the float setting was incorrect after I change the rear shock absorber. The engine angle is increasing after I change the absorber, it about 15-20 degree. So the fuel distribution from the tank is shutdown before fuel on the float bowl rearch it lower limit. That make the fuel can not get through the jet into the air stream. Thats the reason why is my scooter is always having a trouble lately.

I setup my tools to solve the problem.

First, open the baggage and remove it. Next open the bolt on the intake and air intake, and remove the carburetor. Remove the three bolts that hold the float bowl, becareful, do not waste the fuel in it. Now I try to remove float from the seat before adjusting. The float is made from a plastic, but the adjuster is made from a metal, so it can be adjusted.

Remove the metal from the float by cutting on the pilar that stick on the metal. Adjust the metal about 20 degree outer and plug it into the float and stick it with a powerfull glue. Now put everything together to the proper places.

Everything is set, now is just the final test. If this is gonna work or not?

I turn the key on and start the engine. I tried to turn my scooter on about 5 times, but it wont startup. I think the float bowl hasn't fill with the fuel. So I open the throttle a little bit wide and keep it on a few second. I try to turn it again, and it work with a problem. The engine RPM is not constant, I thought that the bowl still hasn't got a proper fuel. So I wait a little longer.

After the engine RPM is constant, adjust the air screw mixture and idle to about 1700 RPM. Now my scooter are ready.

I open the garage and test it.

The scooter work fine with only one rider, now the test continue with tandem. This time, the scooter is fine. The power just like before, a little bit low power than before actually. But I think that because of the valve that set incorrectly by the mechanic.

I test it until Monday and it work fine. So the trouble is solved!

Now I'm ready to move on to the next tune.