XF200 carb boots?

dmmcd · 06-16-2011, 08:00 AM

My brother's XF has a rough idle. We adjusted the valves last night and after some playing discovered that he has a leaky carb boot between the air filter and the carb. I didn't take it all apart to see where it is leaking, or if it is a big crack, but I did try to re-seal the band clamp on the carb. Is it possible to get new boots or should we just take it apart and glob it up with RTV?

I tried looking on the Qlink store site, but they don't have parts breakdown, and I didn't see any carb boots.

Weldangrind · 06-16-2011, 10:31 AM

I'd certainly try black RTV. Just get the repair area as clean as possible, and the RTV should stick just fine.

FastDoc · 06-16-2011, 11:44 AM

That will work but is not pretty if that matters. Another member had a similar problem but I don't remember who. I recall the Suzuki unit will NOT fit and one shouyld be ordered from Q. You will have to call as it's not on the website. IIRC. :wink:

david3921 · 06-16-2011, 08:11 PM

That was me, Doc. But it was the intake between the carb and the head; a lot more critical. I got it from Qlink shipped for $45. I bought another type from JCWhitney for $15 that I can convert if I need another one.

Take the failed intake to an auto supply and see if you can get a gas filler neck hose of the same inside diameter. Others are using these for intake carb boots and are working well. All you are looking for is a path for the clean air to get to the carb. It's one of the supports for the carb so the stronger the better. Radiator hose might work well also.

2LZ · 06-17-2011, 06:03 PM

A lot of good ideas here...but what Im curious about is unless it's sucked in some dirt or something, why would a cracked boot between the air box and carb cause a rough idle? It's not a sealed vacuum area.
I suspect this may not be the end of the search.....

Weldangrind · 06-17-2011, 11:26 PM

Could it be that it's just way too lean because of the crack? I'd expect that the carb is jetted to suit a restrictive airbox, and then a sudden inrush of air would alter the mixture.

Only guessing.

dmmcd · 06-20-2011, 10:18 AM

Quote:

Originally Posted by Weldangrind

Could it be that it's just way too lean because of the crack? I'd expect that the carb is jetted to suit a restrictive airbox, and then a sudden inrush of air would alter the mixture.

Only guessing.

That's my guess too, but if I spray carb cleaner around the boot, the idle picks up. If I press with my hands around the boot, the idle picks up and smooths out. I think it is adjusted for drawing through the air filter, and if it gets unrestricted air coming in, it leans out the mixture.

Weldangrind · 06-20-2011, 10:34 AM

Another thought I had is to use self-vulcanizing rubber tape. If you can take the boot off and wrap around it, the rubber tape should do a nice job of sealing the crack.

SpudRider · 06-20-2011, 10:57 AM

Quote:

Originally Posted by dmmcd

Quote:

Originally Posted by Weldangrind

Could it be that it's just way too lean because of the crack? I'd expect that the carb is jetted to suit a restrictive airbox, and then a sudden inrush of air would alter the mixture.

Only guessing.

That's my guess too, but if I spray carb cleaner around the boot, the idle picks up. If I press with my hands around the boot, the idle picks up and smooths out. I think it is adjusted for drawing through the air filter, and if it gets unrestricted air coming in, it leans out the mixture.

I agree with both of you.

Constant velocity (CV) carburetors are sensitive to changes in the airbox. If the boot from the air box is cracked, the air box is altered, or one installs a pod air filter, it is very likely the operation of a CV carburetor will be affected.

Spud

FastDoc · 06-20-2011, 01:00 PM

Quote:

Originally Posted by Weldangrind

Another thought I had is to use self-vulcanizing rubber tape. If you can take the boot off and wrap around it, the rubber tape should do a nice job of sealing the crack.

That wouldn't look bad either. I've seen that type of tape for sale at the local hardware store.

dmmcd · 06-20-2011, 04:56 PM

Quote:

Originally Posted by Weldangrind

Another thought I had is to use self-vulcanizing rubber tape. If you can take the boot off and wrap around it, the rubber tape should do a nice job of sealing the crack.

I don't think I've seen that before, I'll have to keep an eye out for it. Thanks.

Weldangrind · 06-21-2011, 01:17 AM

It's unique, because it doesn't stick to anything but itself.

06-16-2011, 08:00 AM	#1
dmmcd Join Date: Apr 2011 Location: Souderton, PA Posts: 367	XF200 carb boots? My brother's XF has a rough idle. We adjusted the valves last night and after some playing discovered that he has a leaky carb boot between the air filter and the carb. I didn't take it all apart to see where it is leaking, or if it is a big crack, but I did try to re-seal the band clamp on the carb. Is it possible to get new boots or should we just take it apart and glob it up with RTV? I tried looking on the Qlink store site, but they don't have parts breakdown, and I didn't see any carb boots. __________________ 2008 Yamaha WR250x 2006 Honda CRF250R Sold: 2002 Suzuki SV650S, 2009 Qlink XF200
	0

06-16-2011, 10:31 AM	#2
Weldangrind Join Date: Mar 2009 Location: Sardis, BC, Canada Posts: 25,977	I'd certainly try black RTV. Just get the repair area as clean as possible, and the RTV should stick just fine. __________________ Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer
	0

06-16-2011, 11:44 AM	#3
FastDoc Join Date: Mar 2009 Location: Southeastern Washington desert Posts: 14,761	That will work but is not pretty if that matters. Another member had a similar problem but I don't remember who. I recall the Suzuki unit will NOT fit and one shouyld be ordered from Q. You will have to call as it's not on the website. IIRC. :wink: __________________ Happy to serve.
	0

06-17-2011, 06:03 PM	#5
2LZ Join Date: Mar 2010 Location: Volcano, Ca Posts: 7,102	A lot of good ideas here...but what Im curious about is unless it's sucked in some dirt or something, why would a cracked boot between the air box and carb cause a rough idle? It's not a sealed vacuum area. I suspect this may not be the end of the search..... __________________ "Light a fire for a man, and you heat him for a day. Light a man on fire, and you heat him for the rest of his life." 2007 Suzuki DRZ400S (SM convert) 2009 Q Link XP 200 1967 BSA B25 250cc Starfire 2022 Royal Enfield Interceptor 650 2023 Royal Enfield Scram 411 1948 Royal Enfield Model G 350
	0

06-17-2011, 11:26 PM	#6
Weldangrind Join Date: Mar 2009 Location: Sardis, BC, Canada Posts: 25,977	Could it be that it's just way too lean because of the crack? I'd expect that the carb is jetted to suit a restrictive airbox, and then a sudden inrush of air would alter the mixture. Only guessing. __________________ Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer
	0

06-16-2011, 08:11 PM	#4
david3921 Join Date: Feb 2009 Location: Michigan Posts: 1,035	That was me, Doc. But it was the intake between the carb and the head; a lot more critical. I got it from Qlink shipped for $45. I bought another type from JCWhitney for $15 that I can convert if I need another one. Take the failed intake to an auto supply and see if you can get a gas filler neck hose of the same inside diameter. Others are using these for intake carb boots and are working well. All you are looking for is a path for the clean air to get to the carb. It's one of the supports for the carb so the stronger the better. Radiator hose might work well also.
	0

06-20-2011, 10:34 AM	#8
Weldangrind Join Date: Mar 2009 Location: Sardis, BC, Canada Posts: 25,977	Another thought I had is to use self-vulcanizing rubber tape. If you can take the boot off and wrap around it, the rubber tape should do a nice job of sealing the crack. __________________ Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer
	0

06-21-2011, 01:17 AM	#12
Weldangrind Join Date: Mar 2009 Location: Sardis, BC, Canada Posts: 25,977	It's unique, because it doesn't stick to anything but itself. __________________ Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer
	0