The first JH600 in Nanjing?

[jape]

Out of your league DT? You mean old bugger with potbelly wins beautiful wife who adores him? Woohooo, I might have a chance yet then! China, here I come .... next year is too long to wait ...

Great bike, great lady, great pics. I can see why you took the JH600, she has to hold on to you! Thanks, and please excuse my sense of humour. You will always get some stalling when you run m'bikes on alcohol mate.

[TexasAggie]

No apologies on the humor. You are correct that old, fat, and going bald got lucky in China. After 16 years of being divorced, I came to China 6 years ago and did not last 2 years as a single old man. Happily married is no longer an oxymoron for this old Ag. She even puts up with my Bad China Day rantings by just ignoring me. She is brilliant at it.

The bike probably would have run on alcohol better. I am thinking it might be the fuel giving the ECU fits as noted in another thread. Also need to look at the spark plug and replace as AW and others have suggested. Need to sort it sometime this week if time allows.

[jape]

More strength to you mate! These days it seems happiness is a rare phenomenon and is well worth the effort to keep it.

Have you talked to others with EFI bikes, do they get the problem or is it just the JH600s? The thread suggests it is both fuel and EFI but I think fuel would show up on other such machines. Is there a carby version of that machine or would that be too hard?

I run my (carburetored) Kinlon on anything handy, usually regular, but I have used premium, and even ethanol mix with no stalling problems. The manufacturers say use 'premium' in it but others on the forum have told me that regular in Aus is same as premium over there! Sometimes when I am broke I even top it up with spare 2 stroke mix I have prepared for the chainsaw and I haven't noticed any running problems. You might get some pinking with bad fuel, or gunked up carbies or injectors but the stalling in certain rev ranges only that you get certainly suggests EFI. In my car I found that the sensors in the fuel flow area played up when I took out the air filter and it misses then in some very limited rev ranges, when throttling either up and down in all gears. I don't think Pfaelzer mentioned that problem occuring seriously on all his trips so it might be an idea to compare the EFI model/versions on the bikes that stall with those that don't?

[TexasAggie]

There are several of us experiencing the stalling issue. Try this thread
http://www.mychinamoto.com/forums/sh...JH600-stalling
We will get it sorted one way or the other I am sure. Just need the time to do it.

[Pfaelzer]

... I don't think Pfaelzer mentioned that problem occuring seriously on all his trips so it might be an idea to compare the EFI model/versions on the bikes that stall with those that don't?

Hi Jape and TA,
my JH600 stalls too BUT very rarely and only when I "roll around" with the clutch pulled longer than it needs to. Happened sometimes to me on the streets in cities... low speed, low rpm,never when cornering at speed... not a serious threat to me so far. Guess it is really related to the EFI - there were many stories about that and even BMW had issues with their older F650GS single cylinder series.Eventually they will iron that out I suspect. Need to check on the next software update. When this is out I will order a new EFI unit - keep the old one with the old program - to compare and to be able to switch back in case the new version has other bugs.

Other than that - you can buy a power commander and start tuning by yourself. Quite an investment and unless you are tech crazy like some of us (me) it doesn't seem to make sense doing it.

Cheers,
AW.

[euphonius]

Aggie, great report, you stud! Bigger pictures please. Not sure why they are nesting on the page like that.

As for petrol and stalling, for what it's worth, my experience is closer to Pfaelzers than TexasAggie's -- the stalling is rare and not too troubling (except when it is). It's very possible that Nanjing has a policy of adding ethanol to all fuel in the city. This certainly varies from province to province in China. I don't think the JH600 and its EFI like ethanol.

cheers

[TexasAggie]

I now manufacture Fiber Optic transmitters, etc but my previous life was 20 years in the auto industry manufacturing engines. Based on the symptoms experienced, it did indeed seem to act like the EFI car engines when not set up for ethanol, only much more severe. The injector clogs up in a hurry when the fuel varies off of the calibration specs. I may have used ethanol fuel without realizing it. HEll, I may have dirty fuel but it ran well all day on same tank full. It certainly would not be the first time I screwed up one way or the other. Anyway, I need to change the spark plug as well install the muffler and some expensive pfaelzer authorized suspension upgrades at some point soon. I figure to try and do it over Chinese National Holiday and see what happens. Still looking at locations for having my own private shop but until I can find something close by, I will try again with another local guy I found. (I will supply the tools this time) I like the idea pfaelzer has of buying the new ECU with new software and plugging it in. Good idea to keep the old one around to go back to.

On another note to jkp: How is the collar bone healing up? I hope you are soon back to full speed.

[TexasAggie]

Good News on the stalling with Big Blue in Nanjing.

I drained most of the gas (offered it free to local who offered to siphon it and still wanted it for his scooter even after explanation), rode the JH600 sputtering and coughing to the fuel station and put new fuel in. Bike running back to it's normal level now. I still hope to put in new spark plug and anxiously await the ECU with new software to become available to try but at least I can ride the bike as before. Funny that it did OK on the suspect tank of fuel for 100km before puking but I am not going to over analyze at this point. I will stick with bad fuel as number one possible root cause and move on. Not running perfect, but not so bad as to not enjoy a decent ride!

[jape]

That is good news! Is it too obvious to place a fine mesh in the fuel tank filler and get a better inline fuel filter?

Or maybe collect fuel in a 20 litre container, add 'stabile' or similar and strain it yourself? That is how I often fuel my bike because I don't commute, I just fill and ride when I want from a 20 litre can that I get filled regularly for all my gas fueled tools. I strain it anyway because I often use the can around the chainsaws and trimmer etc. in the shed with all the crap around them, fine sawdust and grass and fine soil dusts. And especially from the fine metal scale or grinding dust that might be around however careful I am. It used to be a pain to do as I always want things 'instant' in this day and age - but I got used to it and it only takes a couple of minutes. Of course I don't have to fill it every time, but I generally top up after a ride as I learned years ago to run gas-fueled motors from a full tank.

[TexasAggie]

Actually, the fuel removed was clean. It is the refining that I suspect is the issue. This same issue sends the design guys in Automotive up the tree here. Fuel often does not meet stated specifications for octane, sulpher, etc. This creates havoc for the ECU trying to figure out what to do. Many of the big OEM car guys, who build the cars here in Nanjing, tell me they actually use different software for same cars depending on what province in China they are sold in. You tune the software for optimum emissions and then get fuel not to spec and the car misses. If you tune the software to run on wider spec fuel, you do not meet the tight emissions. It is a catch 22 if the fuel is not to spec. There are also issues with "knock off fuel" just like "knock off purses and watches" It is just part of the fun here. I was surprised this time as the suspect fuel came from a Synopec which is usually pretty good. Of course, the bike may act up again later tonight when I go out and prove all my suppositions above as garbage. I am just taking good news when I see it for as long as it lasts.