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**karthikdattag** · 12-15-2010, 06:20 PM

Originally posted by deserteagle View Post

Hi guys,
But i started to notice the mileage has dropped to 20 km/L and more than usual smoke is coming out of the silencer, and recently fuel is coming out of the carbu's overflow pipe often, when engine is off but the carburatore's fuel key is on

.

What's there for me to do at this point, i want to change the Carb with the 135's carb. is that OK? and how will i recognize if i'm getting a genuine carb from Yamaha?

Pardon my English guys.

My first question to you is, Do you keep the fuel tap in "ON" position when the bike is at rest (Engine OFF)? If yes, then avoid this habit.

Secondly, your carburettor needs to be serviced. As JD has pointed out, it maybe due to crack, or else when the packing has gone bad. Please open it & replace the packing. Changing to RX135 will solve the issue of over-flow, but why dont you go for new RX100 carb? Keep your bike in original condition, atleast Engine wise, i see some Pulsar + RX setup already.

If you want to convert to 135cc then even the crank shaft, head, carburettor, ignition, sproketing will need to changed apart from Cylinder kit. Are you willing to spend so much??

My suggestion is, Stick to RX100 engine, service the carb as of now & later on get a spare RX100 Carb. And if finance is good then get rid of that Crappy Pulsar tank.

Allah ke waaste RX ko RX he rahne do miyan.

**deserteagle** · 12-19-2010, 11:08 AM

Thanks a lot karthikdattag for your kind suggestions. I usually do not left the fuel key on during long rest but when at signals i usually turn the engine off, at that point sometimes it starts to overflow. now even at signals i turn the key to off position. I serviced the carb only a month ago so this oveflow problem should not be there but it is.

. I tried to buy new mikuni japan carburatore, so paid in advance and to my surprise what i was sent is a Pacco carburatore

. Now guys what am i to do with this, should i repair my old one or try the new one, both are made in India.

Thanks again for pointing the things out for a 135 conversion, which i had little idea of.

Thanks for the fuels tank suggestion but i'll explain it later when i'm done with the cosmetics!

**aargee** · 12-19-2010, 12:00 PM

@DEagle - Did you try Pacco? Did the leaks still appear or did it disappear?

If you've tried Pacco & the leaks are still appearing, then the issue is not with carbs, its else where. But if the leaks stopped, then the issue is with the carbs & you're resolved the issue.

Also does this leak happen when you park your vehicle over night?

Originally posted by deserteagle

but the carburatore's fuel key is on

What is this ^^^? Is this some special key or are you referring to fuel tap under the fuel tank?

**deserteagle** · 12-19-2010, 12:31 PM

@aargee: I haven't installed the carb yet, i thought to consult with you guys first. I'll try to install the carb maybe tomorrow. wish me luck. Its a carb from pacco india, made for RX 100. couldnot find the jets size on their web, but as technical spec it only says Venturi : mm 18, 20, 22. I hope it will solve the overflow problem as the JD666 and karthikdattag suggested.

and for the "carburatore's fuel key" sorry may bad, i referred to the fuel tap under the fuel tank

.

**NitinGirish** · 12-19-2010, 04:28 PM

Fuel overflow could be due to worn out Valve Seat Assembly. Few years back, even I faced the same problem on my bike. Fuel would leak out of drain pipe even while waitig at signal. Replacing the said component solved it.

**deserteagle** · 12-19-2010, 05:16 PM

thanks NitinGirish. I'll try to replace the Valve Seat Assembly. When you were facing this problem were there excessive smoke coming out of the silencer? My second problem is excessive smoke.

**NitinGirish** · 12-19-2010, 06:23 PM

Nope. I only faced the issue of over-flowing carb.

**aargee** · 12-19-2010, 08:48 PM

Originally posted by deserteagle View Post

I'll try to replace the Valve Seat Assembly.

Dude...how many things are you going to try? When you fit the Pacco, if this is the issue, then its going to get resolved. Replacing the valve seat assy is not necessary.

**yamdoot** · 12-19-2010, 09:51 PM

@ Desert eagle. Pacco carbs are not bad at all. In fact they are OE suppliers to many automobile manufacturers.
Few things can cause over flow issues like JD and Karthik said.
1. worn packing.
2. wrong float setting.
3. worn valve seat.

Excessive smoke can be because of-
1. oil mixture settings set to flow more
2. rich mixture
3. worn crank seals.

I feel you can get instant relief just by plonking the new carb.

**deserteagle** · 12-20-2010, 11:06 AM

@aargee i have replaced my old one by Pacco yesterday, so far the carb problem is gone. Will change the Valve Seat Assembly of the old one to have a working backup incase

.

@yamdoot thanks a lot for the Pacco related info

, i was worried bout installing that carb. Now i have to check the oil pump as i am not using premix and crank seals for smoke.

Is it possible for the oil pump to be faulty and always supplying high volume of oil in the carb disregarding the rpm? one of the mech i discussed the matter with told so.

**aargee** · 12-20-2010, 12:11 PM

Originally posted by deserteagle View Post

i have replaced...working backup incase

Good!!!

Originally posted by deserteagle View Post

Is it possible for the oil pump...discussed the matter with told so.

Possible; I don't prefer an oil pump, but if you still insist, get it serviced or replaced so that it becomes more reliable.

**deserteagle** · 12-22-2010, 04:56 PM

carb from Pacco India seems doing a good job. The bike sounds good, cold start usually takes 1-3 kicks. still waiting for the fuel tank to be empty so that i can get an idea on the FE.

**SriramEfunds** · 12-22-2010, 05:11 PM

^ To be on safe side, always check from reserve to reserve so that you don't run out of fuel on the way

**GXP000512** · 08-13-2018, 10:07 PM

Re: Yamaha RX 100 Carburator Problem????

Can I use RX 135 carb on RX 100

Announcement

Yamaha RX 100 Carburator Problem????

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