My NEW XF200 qingqi (Pics!)

**barnone** · 10-09-2010, 07:59 PM

Keep discussing, I'm listening. My new XF200 in the crate should arrive next week. I'll join in when I get it put together.

**MJH** · 10-09-2010, 08:35 PM

It does not seem to be an EGR….it never gets hot no part of the configuration ever gets hot. It does not seem possible that it re-circulates exhaust. I wondered about that because the part of the line to the airbox is rubber and it would melt under exhaust heat. So would the plastic airbox, exhaust gas is hot.

If that device only adds air to dilute the exhaust so that its parts per million are acceptable its retarded to have it.

It’s giving me a headache thinking about it….that’s what it is for… to make my brain hurt.

**barnone** · 10-10-2010, 04:19 PM

Originally Posted by MJH

If that device only adds air to dilute the exhaust so that its parts per million are acceptable its retarded to have it.

MJH,
It injects air so that combustion takes place in the exhaust port to reduce unburned gas. Had the same type device on my Kawasaki W650 and other bikes. Plugging it made the bike run cooler. Also reduced bluing of chrome exhaust pipes since it reduced the exhaust temp.

**MJH** · 10-11-2010, 05:06 PM

It is not an EGR valve and its not a PAIR valve, it is a secondary air intake, it oxidizes the exhaust chamber, that would be when the exhaust valve is closed, then when the exhaust valve opens it releases its hot burning gases into an oxidized chamber then continue to burn. It causes the engine to run hotter and cleaner.

I will discus it with HMF when I take the bike in for a new muffler. If I take that off would it be dirty and would I have more carbon building up down stream. It’s a trade off cleaner and hotter or cooler and dirtier.

I suppose any concern about polluting would be unpopular…..I’m conflicted I hate to become a hedonist and in my case also a hypocrite, because I know what is bad about dirty exhaust.

I would make sure you cap off the air intake and the vacuum line, those being unsealed on dirt bike can bring about some problems. Something that cannot come off, its a way for water and dirt to get in.

**big irish** · 10-12-2010, 04:59 AM

Hey sorry to butt in but anybody know the valve specs on my 2007 qingqi 200. Oh and somthing else I've always wondered, Has anybody tried a heads up race with a XF/XP or qingqi 200 against the DR200. Im wondering how much if any that 2mm smaller carb hurts it. Lovin the info guys, keep it up.

**thedirtypickle** · 10-12-2010, 02:17 PM

I went to a motorsports place earlier this week....

aaaaaaaah it's a bit of heaven, I got to see the suzuki dr400sm. If you've never seen it, switch tabs and google it up. Yep thats drool coming from your mouth. :)
After looking at the dr200, I really dont see a reason why you literally couldn't use engine cylinder and head from it on the xf200. That being said, bigger carb and jet probly means more peppy throttle.

MJH, you're gunna throw some pics up on here after that pipe, right?

I almost forgot... UPDATE: I installed a #135 jet and it is still borderline lean. As I did some searching the mikuni jets can have a deviation af about +/- 10 jet sizes. Whaaaaaaaaaat?!? Meaning the 135 I put in there could be 125-145, I'm thinking probly closer to 125.

You be the judge: (left and right side)
plug color 2 135jet.jpg plug color 135jet.jpg

**thedirtypickle** · 10-17-2010, 01:38 AM

Hey My People!

I've seen much better color on the plug with the 135main jet. Although the WOT is lean, the low and mid range are perfect, so I'll leave it along for now.

I just installed a rear sprocket from a '81 suzuki ts125. The 44tooth made the ride much better. I'm sittin at a solid 6k rpms at 55mph. Acceleration seems about the same accept I can stay in each gear much longer. I also have a sprocket specialist 16tooth front, but I guess I dont have the tools to get it off. It's a 24mm nut and my little impact wrench isnt able to help me out.

I'll keep you posted...

**thedirtypickle** · 11-04-2010, 06:03 PM

I've got to update.

My XF200 has got the following and is pretty darn snappy and enjoyable.
- viper race muffler. (people are right, a new muffler makes a lot of difference.)
- 44t rear sprocket
- 16t front sprocket
- 135 main jet

The viper race can produces a very powerfull deep bass-y sounding roar. It sounds pretty close to a dr400sm that rides around my town. It's still pretty quiet at idle and is moderate at mid throttle, but when you open it up, wooowsers! She belts out a hell of a roar, it's my first bike so I can only base this one ones I've heared. It's quite enjoyable sounding.

The new gearing is a must as I'm sure you owners out there know. I now am hitting 55mph at 5600rpms or so. Much better there.

**CrazyCarl** · 11-04-2010, 09:25 PM

Solid mods to the bike. With the QingQi for sale at the price, I'm not sure why anyone would want to pay over 3k for a DR200...except maybe parts support.

CC

**thedirtypickle** · 11-05-2010, 05:34 PM

I'm not sure why anyone would want to pay over 3k for a DR200...

I havent a clue. Dare I say, the dr200 is a little ugly in comparison. Upon looking at the dr200's engine, there doesnt seem to be a reason that an engine rebuild (piston & up) would not be exact fit.