Thanx 4 ur replies

As stated by argee,the problem is same.Guy at A.S.C washed the petrol cap and voila problem has gone.Actually it was not washed for years that's why it is clogged with dust particles.

Once again a BIG HEARTED thanx to all of you for providing me support as i m new to understand these type of problems.

Hahaha...I'm fully in LOL
@JD - I couldn't understand that stuff. Could you pls elaborate it further pls? BTW - I've a new Rx100 tank & new fuel tank cap & new fuel cock. So no question of rust or wash. Hence this question. Thanks as always.

^^ tank caps have a one way breather hole in em. its to ensure that air keeps entering so as to take the space of the fuel going out from the tank. But it keeps air from escaping, otherwise the fuel would also start evaporating. Also to keep water from entering.

If this is clogged, then this issue would be faced.

im guessing in a new cap they mustve put some form of protective coating that would be causing the blockage ( just guessing )

Good
When troubleshooting one needs to think small

Yep...simple enough solution and it never strikes that the answer could be this easy.

Thats what happens when you work in IT - engineering complex solutions to simple problems

^LoL! Funny thing is even I had experinced the same problem and adopted the same solution. Completely forgot about it

P.S: I work in IT industry but I am not a techie though

Carburettor and battery problems

Hey Guys,

My yamaha was lying in the garage for approx 2 1/2 months. I started the bike by giving choke and 4 kicks. I rode it for approx 100 - 150 kms. Now i have changed the regular spark plug to iridium one. I have opened the carburettor and have it cleaned. But even then my bike doesnt seem to touch 100kmph. The max it touched is 95kmph. Also after putting any gear the bike pulls smoothly but if you try to accelerate more then it feels like its less of fuel or i am forcefully dragging the bike. Can anyone help me on this.

I went to my mechanic again and he cleaned the air filter and did some setting in the carburettor but i am still not satisfied with the pick up.
Is it the problem with the spark plug or the carburettor.

Also another problem i am facing is of the battery. i have 2 horns on my yami and there are cutouts for the same. Recently when i serviced that time i had charged my battery and the horn was working. But after a day or two, now my horn is not working, and the neutral light is showing weak battery. Is it a problem with the battery or the rectifier.

Sorry to merge my problems in this thread.

@dare - if you've one or more of the following then there's something really fishy going on with your motorcycle, provided they're one in the Rx series
1. Flatslide carbs
2. Expansion chamber
3. Ported barrel
4. FFE
5. 5 Speed gearbox & AM sprockets

BTW - you haven't told what's the model & make? Is it Rx100 or RXG or 4 speed Rx135 or 5 speed Rx135 or YBX or Gladiator?

Aargee,

I have an Yamaha RX-100 1994 model, 4 gears. I have purchased this bike from someone else. Everything was running smooth before cleaning the carb and Also since the bike was really struggling we removed the back wheel and found out that the black rubber which fits inside the rim is worn out and replaced the same, but still i dont find the performance upto the mark.

If i ride the bike at a standard speed of 40-50 then i am not facing any problems. Its only when i try to utilise its power that i found out abt the problem. I also mix 2T oil in the petrol + the oil is flowing from the oil tank (kept it at minimal). Do i need to remove the carb again and clean it thoroughly, or do i need to adjust some settings.

Also if anyone knows how do i know the stock setting for the carburettor (petrol+air mixture).

@daredemon - come see me this weekend and we'll sort it out for you. PM me with your phone number.

Perfectly agreed; I'm aware of this as I've experienced this issue too; but there will be a slight knock/slag/jerks in the wheels when the gears are changed & accelerated; I'm unable to put it in right words, but hope you got the point. He didn't mention such symptoms & says its smooth; I'm assuming that he's expecting 95 in a zoom (or may be very quickly), this is the feeling I got when I read his post. If the bike is stock, zoom & 95 sounds OK to me;

Ok, but what's the carb you're running stock or Flatslides? I run on 28mm flats & have cut out the oil pump completely; never know when the pump stops working

You are lucky @daredemon I think taking gsferrari's help would be sensible.

Theoretically you need to turn the air screw clockwise until it is seated lightly and then turn it anti-clockwise for one and a half turn. One turn proved a little rich for my bike.

But if you are a novice it is better to take help.I managed to do it less-than-perfectly inspite of Pradeep guiding me over phone

Also, don't flood your engine with 2T man. Decide either pre-mix or pump. Use only one. Trust me, too much 2T screws up the 'feel' of the bike. Mixture becomes lean and you will experience roughness when revved hard.

Also, regarding top speed, how much was your bike doing prior to carb overhaul? On a bone stock RX be happy if you can manage speedo indicated 100-110.

I have an rx100 (1989). When the bike is started, I can hear some strange noise in the engine. The sound of the bike is not like a typical rx100 sound, I mean its not crisp and metallic like the way it is supposed to be. Can someone tell me what to do about this

Sent you a PM

I have sent you a PM. Please check and reply.

Hey Nitin,
Thanks for the valuable advice. Actually i get to ride my bike only for a month as i work abroad. 3 months at work and 1 month at home. So i am not able to dedicate enough time for her.