ChinaV's new Yingang YG250NF (YG250-6)

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Originally Posted by felix

Good stuff ChinaV, those levers looks very nice. Does the adjustability help with your issues of the brake lever not biting soon enough?.

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No, the brakes work good, but the feel at the lever sucks. So far I tried three different master cylinder/lever setups and completely flushed the system with good DOT4 fluid. Still need too much pull before they start to react. Not sure if it's the lines or the calipers.

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Originally Posted by felix

Would like to see a pic of whole front end with the bar end mirrors. From the pic above they seem cool. Good thing you don't have to weave through tight traffic on your way to work, here in shanghai they would last about a day...

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Total width is only 95 cm, about the same as having luggage on the bike. Bike is 82 cm with stock bars and weights on the ends.

Pics...just for you Felix.

http://www.contactdi.com/Processed/1080915.jpg

http://www.contactdi.com/Processed/1080910.jpg

http://www.contactdi.com/Processed/1080903.jpg

Cheers!
ChinaV

Bike is looking prettier by the day. :thumbsup:

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No, the brakes work good, but the feel at the lever sucks. So far I tried three different master cylinder/lever setups and completely flushed the system with good DOT4 fluid. Still need too much pull before they start to react. Not sure if it's the lines or the calipers.

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Maybe better imported brake pads? Brake pads look similar to mine, I modified some jap pads to fit and they worked well. might improve power and modulation.

Cheers for the pics, that bike is just lovely. The bar end mirrors work for me!

Looking at your tyres, it seems your pussy stripes aren't any smaller than mine on the XTR. How long do you reckon before you reach the edge? How far can you go before the pedals scrape?

The bike looks really good with those bar end mirrors! Plus the clear turn signals, black levers and bars... starting to look pretty mean!

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How far can you go before the pedals scrape?

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From the front view of the bike, looks like you'll be scraping the side stand before you get the pegs to touch (plus you;ll still get a bit of deflection and compression from the tire, putting the side stand that much farther out there)

Attachment 2941

The pegs sit awfully high on the Yingang as well... I like it, feels like a good 'ol street bike should. The whole side stand assembly looks a little chunky and "out there"... maybe the next upgrade / tweek ChinaV?

http://www.contactdi.com/Processed/1080853.jpg


Very Similar gauges to the GN250 gauges.
http://i784.photobucket.com/albums/y...zuki/GN250.jpg

Hello. Pete here.
I'm a new member to this site but I've been viewing it a while.
For the past 18 months I have been riding a piece of crap, Chinese excuse for a motorbike and for the past 17 months I've been looking for good replacement.

I've finally decided to get a YG250-6 due to your review which I have read over and over. I will buy one in the next few months. It's a great looking bike (apart from the welding but my JD150-15 is nowhere near as good) and I'm already sold...

...I just want to ask, has the torque issue improved over time since your initial tweaks? You said that it suffered a lot down low.

Holy shit -- there's now an MCM quorum in Zibo!

Welcome to the forum, Pete. Have you connected yet with ZMC888? You've surely seen him screaming around town on his RR 250.

Stay sober (at least while riding)!

cheers

Howdy Pete,

Nice to see you here on the forum. Now that you've gone public with your moto status, we expect lots of details of your China adventures.

So far I've clocked about 1500 kilometers on the Yingang and the bike has performed well. I bought it as a commuter, and she does a great job of making my ride to work an enjoyable experience. The bike is a little on the small side, if you're over 180cm tall, it can be a tad cramped, which makes long distance touring a bit painful. The suspension is fine for twisty pavement, but suffers on the bad roads, she's not an adventure bike, but does well as a canyon carver.

The power issue seems to be a simple matter of carburetion. China doesn't have any companies making large bore carburetors, so everyone slaps the same PZ30 carb on almost all the bikes and sends them on their way. Since the whole industry is heading towards fuel injection, I doubt they're going to invest in producing new models of carburetors. If you want power out of the Yingang, you have to keep the RPM's above 5000, she's got plenty of juice up there. Given some time to tinker, I think there's plenty of gain to be made in the low end with jetting changes or swapping to a larger carb size.

If you have nice twisty roads with good pavement around, I think you will be very happy with the YG250-6. The Yamaha YBR250 is probably a bit nicer, but it's a lot more money.

Cheers!
ChinaV

Note to self...Honda NX-250 Specs (May also be the same as the Honda AX-1)

The Honda NX-250 came stock with a Keihin 32mm PD 6BA Carburetor

The transmission of the NX-250:
Primary reduction 2.7272 (60/22)
Final reduction 3.1538 (41/13)
Gear ratio: 1 = 2.8461 (37/13)
Gear ratio: 2 = 1.7777 (32/18)
Gear ratio: 3 = 1.3333 (28/21)
Gear ratio: 4 = 1.0416 (25/24)
Gear ratio: 5 = 0.8846 (23/26)
Gear ratio: 6 = 0.7857 (22/28)

Spark plug = NGK CR9EH-9

Intake Valve clearance = 0.23mm (0.009in)
Exhaust Valve clearance = 0.23mm (0.009in)
* Interesting to note that the inspection interval is at 1000 kilometers and then 36,000 kilometers.

Oil Capacity 1.3 Liters

I will see what the Yingang factory has to say about how their engine specs against the original Honda.

Cheers!
ChinaV

Honda NX250 = Honda AX1 just different markets as I understood...The Chinese Code for the engine is 170MM.

ADVRIDER has a NX250 owners group with heaps of information on that bike, engine and drivetrain.

Following are the specs of the Shineray X2 withs same/similar? engine (170MM):

Gear ratio:
Primary reduction 2.727 (same)
Final reduction 3.286
Gear ratio: 1 = 2.846
Gear ratio: 2 = 1.882
Gear ratio: 3 = 1.389
Gear ratio: 4 = 1.143
Gear ratio: 5 = 0.957
Gear ratio: 6 = 0.833

Spark Plug is identical, Oil Capacity is 1.4l

Intake Valve clearance = 0.15mm +/-0.03
Exhaust Valve clearance = 0.20mm +/-0.03

Installed Carb is a PZ30

Fuel Consumption 2.4L/100km --> nope!