ChinaV's new Yingang YG250NF (YG250-6)

[ChinaV]

Hi V,

something about the valve adjustments. I checked with the local Shineray guys earlier in January, they had no Shims by then, but promissed to get them. Called them today seems they didnt bothered with it...WHERE IS THIS TIC ICON

The parts manual uses this description: 调整垫
I assume I will need 4 shims, but what size can only be measured once everything is taken apart. Do you know where in China (taobao?) get a whole set of suitable shims? (I only find YoYo spare parts)

Don't bother that "Shineray" clown. 4-wheel use similar thing, just go to car parts city find a right one.

I think humanbeing is correct about finding car ones. I will see if I can get a spec from Yingang and maybe try to buy a complete set. Would be happy to share the kit with you André, seems a bit of a waste for both of us to buy them as the bike will most likely get by with only a couple valve adjustments in its life.

Cheers!
ChinaV

[humanbeing]

Nx250 shop manual http://ray-chi.tw/bbs/read.php?tid=14648 (to that Taiwanese guy)

[andre555]

Thats what fits the NX250 - should fit the 170MM engine:
7.48mm Valve Shim Kit (141 total Shims)
Includes three 7.48mm OD Valve Shims of each size from 1.20 to 3.50mm in .05 increments.
==> http://www.cyclebuy.com/shopping/hot...imkits_748.htm

Fits for these bikes:
HONDA
CRF 250R/X, NX 250, CB1 400, CBR 600 F2/F3/F4, CBR 600RR, RC-30,
RC-45, 750 Magna 94-00, VFR 750, VFR 800, CBR 900/929/954, CB 919,
CBR 1000RR, CBR 1100XX, ST 1100, GL 1800

YAMAHA
YZ 250F, WR 250F, FZR 400, FZR 600, YZF 600, YZF-R6, YZF 750, FZ 1,
FZR 1000, GTS 1000, YZF 1000, YZF-R1

SUZUKI
RM-Z 250, GSXR 600, GSXR 750 93-02, SV 650, DL 650, RF 900,
GSXR 1000, GSXR 1100 93-98

KAWASAKI
KX 250F, ZX 600, ZX 6-R, EX 250

Question: What "Chinese" car has this size - couldnt find anything, guess need to go to the market.

[humanbeing]

Found a factory in Google that supplies 7.48mm OD Shim http://www.nbwlqcpj.cn/
ChinaV,
Can u "save" bikers in China by order themdirectly from "maker" ? It's hard to find kits as in Western world.

The DIY version: http://motorcycle.sh.cn/t_16849339.htm


-
IF can't find on "mart" , http://item.taobao.com/item.htm?id=6776997061

[MJH]

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!

TK MV34 is what is on the Megelli getting that carburetor out of HISUN and changing the final drive ratio would likely be the easiest route to go. The Megelli I believe has a final drive ratio of 2.87 or about bet the bikes at its best at or around 3.0 for city driving.

The guy on china riders, that has a Meggelli changed his rear sprocket to some huge tooth count and found the bike all strung out in first and second…yours has a very tall gearing so that looks like it’s the carburetor.

Those engines should all be very similar…so configuring it off the Megelli would seem the easiest way to go. Trick is getting anyone that will sell you one, that and adjusting it.

Yingang took the low budget approach and used a cheap carburetor, so it seems.

[dewsnap]

After reading this review and drooling over the pics i contacted Yingang about this bike. It turns out that the bike is NOT registerable in China anymore. Devastating!
Looks like ChinaV got the bike just before the cut off date. I've attached a snipet from an email sent to me from a source that Yingang. I don't know what the EURO3 is but i'd guess it's some kind of emissions test that the bike failed?

"But sorry ,now this bike can not do registion . ???? was successful to do regesiton before,but these days in China ,goverment gave us a rules for registion ,must reach EURO3 after FEB .28th,then can do resigition. Now it is already Mar.3th ,but our bike only EURO2,so now can not do registion. Pls check whether have problem for you , for normal chinese ,if not do resigtion ,must have problems...it is better not to try this model now." - source at Yingang

[td_ref]

...

they are telling the truth. Any bike register after 28th of Feb must pass Euro3 emission test. So if you want one register, then wait for the new euro3 fuel injection one which they promise better. at least till June, we'll see.

[andre555]

SUCCESS!!! Went with slabo to the Shineray shop just to check situation and maybe fins shims somewhere nearby.
Zhao Feng, the Shineray Motorcycle Club "SRMC" - Shop leader had shims there, several sizes...So valve adjustment was on!
Everything finished, next time in 36.000km

[ChinaV]

SUCCESS!!! Went with slabo to the Shineray shop just to check situation and maybe fins shims somewhere nearby.
Zhao Feng, the Shineray Motorcycle Club "SRMC" - Shop leader had shims there, several sizes...So valve adjustment was on!
Everything finished, next time in 36.000km

Glad you got the shims . Did you do the adjustment? Were they in or out of spec?

Cheers!
ChinaV

[andre555]

Glad you got the shims . Did you do the adjustment? Were they in or out of spec?

I just supervised, watched & learned while assisting Zhao Feng. I have never done any valve things, my tinkering expierence is limited to 2-stroke engines on my Trabant and Simson 50cc's - these machines run magicly without any valves
Now I know - could handle it myself now if I had shims.

3 valves were out of spec by up to 0.15mm, one was okay. Initially all 4 valves were with 1.80mm shims equiped.

Out of this expierence, I guess if you get shims within 1.5mm - 2.1mm you should be fine.

I have 2.600km on the bike. Lets hope the engine is build to Honda spec and fullfills the 36.000km till next adjustment...that will take a while