New Air filter = carb rejet

tokarev · 07-28-2013, 12:02 PM

Finally got around to installing the filter I bought a few years back - Now I need to know the recommended carb jet sizes. I live at sea level in semi tropical central Florida if that makes any difference. At the same time I am going to try ditching the battery - leave the wiring minus the battery. Any ideas are welcome.

Weldangrind · 07-28-2013, 01:59 PM

Please remind us of the engine size.

Also, no battery can work. That's how Son of Weldangrind's 83 XR200R is set up right now. It starts every time he kicks it, so we haven't installed a battery yet, but it's on the list.

tokarev · 07-28-2013, 02:07 PM

250 model so 230

Weldangrind · 07-28-2013, 02:17 PM

Are you running a Mikuni or a Keihin clone?

tokarev · 07-28-2013, 03:42 PM

Mikuni I believe

matasar · 07-28-2013, 05:38 PM

im running same stuff and bored mine 1.1mm, most pull at 5000 i think with current but revs to 8000 or less..any thing above 1.1 is bad.
pin set to middle else it will go rich.
Living by the sea in north sweden and its 25c or so out.
Would like to try 1.05

Weldangrind · 07-29-2013, 02:36 AM

With 230cc at sea level (and a Mikuni, identified by four float bowl screws), foam pod filter and free-flowing muffler, I'd use a 115 main and a 27 to 30 slow jet.

tokarev · 08-01-2013, 12:04 PM

Thanks for the info on the carb jets - 2 questions, should those jets be available at a local bike shop? and the bulge in the exhaust pipe is a cat converter? Have tig welder will fix if so.

Weldangrind · 08-01-2013, 08:15 PM

Mikuni jets can be found at the local Yamaha dealer, but Honda will be hit or miss if it has a Keihin clone.

If the bulge is in the header pipe, it is most likely a cat. Do you have an air injector as well? It will most likely be a tube and flange on the right side of the head.

tokarev · 08-02-2013, 11:41 AM

Yes on the air injector - I removed that right away.

Weldangrind · 08-02-2013, 11:01 PM

You'll definitely need fatter jets once the cat is removed. You'll notice the increase in power.

07-28-2013, 12:02 PM	#1
tokarev Join Date: Sep 2007 Location: Safety Harbor Florida USA Posts: 214	New Air filter = carb rejet Finally got around to installing the filter I bought a few years back - Now I need to know the recommended carb jet sizes. I live at sea level in semi tropical central Florida if that makes any difference. At the same time I am going to try ditching the battery - leave the wiring minus the battery. Any ideas are welcome. __________________ Home of the SHTF 50 , SHF R50 and KEG12 shotguns
	0

07-28-2013, 01:59 PM	#2
Weldangrind Join Date: Mar 2009 Location: Sardis, BC, Canada Posts: 25,977	Please remind us of the engine size. Also, no battery can work. That's how Son of Weldangrind's 83 XR200R is set up right now. It starts every time he kicks it, so we haven't installed a battery yet, but it's on the list. __________________ 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

07-28-2013, 02:07 PM	#3
tokarev Join Date: Sep 2007 Location: Safety Harbor Florida USA Posts: 214	engine size 250 model so 230 __________________ Home of the SHTF 50 , SHF R50 and KEG12 shotguns
	0

07-28-2013, 02:17 PM	#4
Weldangrind Join Date: Mar 2009 Location: Sardis, BC, Canada Posts: 25,977	Are you running a Mikuni or a Keihin clone? __________________ 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

07-28-2013, 03:42 PM	#5
tokarev Join Date: Sep 2007 Location: Safety Harbor Florida USA Posts: 214	carb type Mikuni I believe __________________ Home of the SHTF 50 , SHF R50 and KEG12 shotguns
	0

07-28-2013, 05:38 PM	#6
matasar Join Date: Jul 2013 Posts: 27	im running same stuff and bored mine 1.1mm, most pull at 5000 i think with current but revs to 8000 or less..any thing above 1.1 is bad. pin set to middle else it will go rich. Living by the sea in north sweden and its 25c or so out. Would like to try 1.05
	0

07-29-2013, 02:36 AM	#7
Weldangrind Join Date: Mar 2009 Location: Sardis, BC, Canada Posts: 25,977	With 230cc at sea level (and a Mikuni, identified by four float bowl screws), foam pod filter and free-flowing muffler, I'd use a 115 main and a 27 to 30 slow jet. __________________ 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

08-01-2013, 12:04 PM	#8
tokarev Join Date: Sep 2007 Location: Safety Harbor Florida USA Posts: 214	jets Thanks for the info on the carb jets - 2 questions, should those jets be available at a local bike shop? and the bulge in the exhaust pipe is a cat converter? Have tig welder will fix if so. __________________ Home of the SHTF 50 , SHF R50 and KEG12 shotguns
	0

08-01-2013, 08:15 PM	#9
Weldangrind Join Date: Mar 2009 Location: Sardis, BC, Canada Posts: 25,977	Mikuni jets can be found at the local Yamaha dealer, but Honda will be hit or miss if it has a Keihin clone. If the bulge is in the header pipe, it is most likely a cat. Do you have an air injector as well? It will most likely be a tube and flange on the right side of the head. __________________ 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

08-02-2013, 11:41 AM	#10
tokarev Join Date: Sep 2007 Location: Safety Harbor Florida USA Posts: 214	Yes on the air injector - I removed that right away. __________________ Home of the SHTF 50 , SHF R50 and KEG12 shotguns
	0

08-02-2013, 11:01 PM	#11
Weldangrind Join Date: Mar 2009 Location: Sardis, BC, Canada Posts: 25,977	You'll definitely need fatter jets once the cat is removed. You'll notice the increase in power. __________________ 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