air intake question ....... - Page 3

fatboy250 · 02-23-2007, 10:27 AM

Ours are on the bottom position with the K&N type filters with 2 1/2 turns out on the air/fuel mixture screw.

Jason

red2003 · 02-23-2007, 11:55 AM

Jason, have you pulled a plug with those setting to see how she's burning? I'm getting ready to do t.eeh filter mod this weekend. Kinda like to do it right the first time, if you know what I mean. Thank Bud!

fatboy250 · 02-23-2007, 01:33 PM

No, but there is no stumble on rolling acceleration and no backfire from WOT to zero thottle on decel. If it could run any better, I guess a dyno would be the only way to know for sure. But I've only got my seat of the pants to go on.

PolygonFla · 02-23-2007, 02:19 PM

With all the talk about air filter replacment, I decided I wanted to experament with the Pod/Cone/K&N style filter.

I just ordered one from Bike Bandit
http://www.bikebandit.com/partsbandi...ion_Path~3.asp
The link is for the 200cc honda replacement. I have a Zongshen so I ordered the Yamaha part but it looks exatly like the Honda one. the part numbers are different by one digit.

Anyway I will document how it goes.

bfe71730 · 02-23-2007, 03:16 PM

I kinda sorta agree with OB1. The small filters are great for high performance engines, but for everyday use I'd stick with the larger foam type (UNI) if running with out the air box. Think about riding down a dirt road following your buddy and eating his dust with no goggles or eye protection, imagine how much of this it getting flitered by your engine....
BTW....RESPECT YOUR ELDERS... :wink:

PolygonFla · 02-23-2007, 03:41 PM

Is thist the type you are talking about?
http://www.bikebandit.com/partsbandi...ion_Path~3.asp

They cost 3X more but I do belive you get what you pay for.

I knew getting my China bike at 1/3 the cost of a Yamaha I would be making some sacrifice in quality somewhere. So far I am very satisfied with the compromise.
I just wonder if the Uni filter is;
1 worth the extra cost to protect a $500.00 engine
2 better performing than OEM or Pod (likely)
3 going to fit, with or without modification.

I might get one just because I like to experiment and I am willing to spend $30.00 to find out. If the pod type shows any HP gain I will try the Uni too.

ambassador · 02-23-2007, 05:03 PM

Is there really a significant amount of HP increase with the pod filter?

bfe71730 · 02-23-2007, 08:00 PM

There will be some power increase, but you will need to do some exhaust mods to get the most noticeable increase, I drilled several holes around the inner tip before I did any filter or carb adjustments.

blimpman · 02-23-2007, 08:15 PM

How would you attach the UNI Pod filter (referenced below) to the Carb?

Quote:

Originally Posted by PolygonFla

Is thist the type you are talking about?
http://www.bikebandit.com/partsbandi...ion_Path~3.asp

I might get one just because I like to experiment and I am willing to spend $30.00 to find out. If the pod type shows any HP gain I will try the Uni too.

Roketarider · 02-23-2007, 08:15 PM

Quote:

Originally Posted by ambassador

Is there really a significant amount of HP increase with the pod filter?

I bored out the exhuast today at the end and it picked up a little bit. The pod filter I wouldn't say picked up a noticeable amount, but if you have done your bike in stages, you can feel a slight increase.

ob1 · 02-23-2007, 08:27 PM

Mods will pay off when coordinated. Done as single items, increases in power will be less, sometimes to the negative!

My powertrain mods are Uni filter, filter firescreen stripped to one layer, port matched intake manifold, port matched exhaust port, White Bros CDI and Cobra exhaust. While mine is geared specifically for offroad, with a smaller rear sprocket, I would be a betting man!

Next time I have the exhaust header off, I will be doing some grinding and polishing in the exhaust port.

bfe71730 · 02-23-2007, 09:19 PM

Quote:

Originally Posted by blimpman

How would you attach the UNI Pod filter (referenced below) to the Carb?

Quote:

Originally Posted by PolygonFla

Is thist the type you are talking about?
http://www.bikebandit.com/partsbandi...ion_Path~3.asp

I might get one just because I like to experiment and I am willing to spend $30.00 to find out. If the pod type shows any HP gain I will try the Uni too.

this one goes in the air box, I've seen the UNI type that come off the carb just like the pod type, main difference is they are cylinder shaped and larger.

fatboy250 · 02-24-2007, 11:41 AM

Quote:

Originally Posted by PolygonFla

With all the talk about air filter replacment, I decided I wanted to experament with the Pod/Cone/K&N style filter.

I just ordered one from Bike Bandit
http://www.bikebandit.com/partsbandi...ion_Path~3.asp
The link is for the 200cc honda replacement. I have a Zongshen so I ordered the Yamaha part but it looks exatly like the Honda one. the part numbers are different by one digit.

Anyway I will document how it goes.

Just a side note, the one pictured is not the filter you will get. If you look closely it is a 76mm in the picture.

Ferrit · 02-24-2007, 03:20 PM

Just a little "scientific" data to throw into this discussion:

http://www.roadkill.com/~davet/moto/air.filters.html

http://www.bobistheoilguy.com/airfilter/airtest1.htm

4xflyer · 03-02-2007, 08:55 AM

For my JetmotoGY-A200 I use a uni filter#NU-4037ST (Honda ATC200 81-82). Cut the length to fit the stock cage (you can use your old filter as a pattern), you can get two double filters from each one.

If you choose to only run a single filter you can get four filters from one uni...I would use the single filter set-up only in zero to minimal dust situations.( these filters are of different densities.)

To me the big thing with the stock airbox is the base sealing of the filter cage against the airbox itself. Be sure that it is air/leak tight or the filter issue is mute!

Jetting didn't change and I used a filter oil to lightly!! impregnate each sleeve. Running a bit lean I will next drop the clip from the middle position as others have suggested.

For the price of $14. it is a very cost effective way to make use of your stock airbox at least with my bike.

I have considered using the gauze type clamp on type filter to allow the battery to be moved to the airbox area. I do know the Suzuki 250 DRZ battery works well with the Jetmoto, is about 400g lighter, is a sealed unit and is 3/4 the size of the stock 200GY-A battery....guess that'a another post topic.

02-23-2007, 10:27 AM	#31
fatboy250 Join Date: Sep 2006 Location: COLUMBIA, SC Posts: 973	Ours are on the bottom position with the K&N type filters with 2 1/2 turns out on the air/fuel mixture screw. Jason __________________ 2008 Jonway MC-70-150 2007 Roketa DB-07B (RSM-200E) 2006 Roketa DB-07A (RSX-200E) 1995 Kawasaki Concours (ZG1000)
	0

02-23-2007, 11:55 AM	#32
red2003 Join Date: Jan 2007 Location: Northern Vermont, USA Posts: 1,271	Jason, have you pulled a plug with those setting to see how she's burning? I'm getting ready to do t.eeh filter mod this weekend. Kinda like to do it right the first time, if you know what I mean. Thank Bud! __________________ First Chinabike: 2006 Roketa RSX200E Current Chinabikes: 2023 Titan DLX & 2022 Lifan KP Mini w/ 210cc BRT kit, 22 RWHP!
	0

02-23-2007, 01:33 PM	#33
fatboy250 Join Date: Sep 2006 Location: COLUMBIA, SC Posts: 973	No, but there is no stumble on rolling acceleration and no backfire from WOT to zero thottle on decel. If it could run any better, I guess a dyno would be the only way to know for sure. But I've only got my seat of the pants to go on. __________________ 2008 Jonway MC-70-150 2007 Roketa DB-07B (RSM-200E) 2006 Roketa DB-07A (RSX-200E) 1995 Kawasaki Concours (ZG1000)
	0

02-23-2007, 03:16 PM	#35
bfe71730 Join Date: May 2006 Location: South Arkansas Posts: 198	I kinda sorta agree with OB1. The small filters are great for high performance engines, but for everyday use I'd stick with the larger foam type (UNI) if running with out the air box. Think about riding down a dirt road following your buddy and eating his dust with no goggles or eye protection, imagine how much of this it getting flitered by your engine.... BTW....RESPECT YOUR ELDERS... :wink: __________________ 2004 KAZUMA CHEETAH 200 2001 Yamaha Big Bear 400 1986 Honda ATC 250ES 1983 Honda ATC 200X 1974 Kawasaki KE100
	0

02-23-2007, 08:00 PM	#38
bfe71730 Join Date: May 2006 Location: South Arkansas Posts: 198	There will be some power increase, but you will need to do some exhaust mods to get the most noticeable increase, I drilled several holes around the inner tip before I did any filter or carb adjustments. __________________ 2004 KAZUMA CHEETAH 200 2001 Yamaha Big Bear 400 1986 Honda ATC 250ES 1983 Honda ATC 200X 1974 Kawasaki KE100
	0

02-23-2007, 02:19 PM	#34
PolygonFla Join Date: Jan 2007 Location: Florida USA Posts: 196	With all the talk about air filter replacment, I decided I wanted to experament with the Pod/Cone/K&N style filter. I just ordered one from Bike Bandit http://www.bikebandit.com/partsbandi...ion_Path~3.asp The link is for the 200cc honda replacement. I have a Zongshen so I ordered the Yamaha part but it looks exatly like the Honda one. the part numbers are different by one digit. Anyway I will document how it goes.
	0

02-23-2007, 03:41 PM	#36
PolygonFla Join Date: Jan 2007 Location: Florida USA Posts: 196	Is thist the type you are talking about? http://www.bikebandit.com/partsbandi...ion_Path~3.asp They cost 3X more but I do belive you get what you pay for. I knew getting my China bike at 1/3 the cost of a Yamaha I would be making some sacrifice in quality somewhere. So far I am very satisfied with the compromise. I just wonder if the Uni filter is; 1 worth the extra cost to protect a $500.00 engine 2 better performing than OEM or Pod (likely) 3 going to fit, with or without modification. I might get one just because I like to experiment and I am willing to spend $30.00 to find out. If the pod type shows any HP gain I will try the Uni too.
	0

02-23-2007, 05:03 PM	#37
ambassador Join Date: Jan 2007 Location: Bradenton, Florida Posts: 1,200	Is there really a significant amount of HP increase with the pod filter?
	0

02-23-2007, 08:27 PM	#41
ob1 Join Date: Jul 2006 Posts: 499	Mods will pay off when coordinated. Done as single items, increases in power will be less, sometimes to the negative! My powertrain mods are Uni filter, filter firescreen stripped to one layer, port matched intake manifold, port matched exhaust port, White Bros CDI and Cobra exhaust. While mine is geared specifically for offroad, with a smaller rear sprocket, I would be a betting man! Next time I have the exhaust header off, I will be doing some grinding and polishing in the exhaust port.
	0

02-24-2007, 03:20 PM	#44
Ferrit Join Date: Nov 2006 Location: Lawrenceburg, KY Posts: 178	Just a little "scientific" data to throw into this discussion: http://www.roadkill.com/~davet/moto/air.filters.html http://www.bobistheoilguy.com/airfilter/airtest1.htm
	0

03-02-2007, 08:55 AM	#45
4xflyer Join Date: Feb 2007 Location: W. Massachusetts USA Posts: 25	For my JetmotoGY-A200 I use a uni filter#NU-4037ST (Honda ATC200 81-82). Cut the length to fit the stock cage (you can use your old filter as a pattern), you can get two double filters from each one. If you choose to only run a single filter you can get four filters from one uni...I would use the single filter set-up only in zero to minimal dust situations.( these filters are of different densities.) To me the big thing with the stock airbox is the base sealing of the filter cage against the airbox itself. Be sure that it is air/leak tight or the filter issue is mute! Jetting didn't change and I used a filter oil to lightly!! impregnate each sleeve. Running a bit lean I will next drop the clip from the middle position as others have suggested. For the price of $14. it is a very cost effective way to make use of your stock airbox at least with my bike. I have considered using the gauze type clamp on type filter to allow the battery to be moved to the airbox area. I do know the Suzuki 250 DRZ battery works well with the Jetmoto, is about 400g lighter, is a sealed unit and is 3/4 the size of the stock 200GY-A battery....guess that'a another post topic.
	0