For technical requests regarding the fuel system and the air inlet system http://www.aegeansoft.com/silverwing/phorum/list.php?25 Sat, 04 Sep 2010 21:17:08 -0700 Phorum 5.2.8 http://www.aegeansoft.com/silverwing/phorum/read.php?25,7559,7559#msg-7559 http://www.aegeansoft.com/silverwing/phorum/read.php?25,7559,7559#msg-7559 silverpete55 Fuel and Air System Thu, 18 Jan 2007 13:10:47 -0800 http://www.aegeansoft.com/silverwing/phorum/read.php?25,7477,7477#msg-7477 http://www.aegeansoft.com/silverwing/phorum/read.php?25,7477,7477#msg-7477 silverpete55 Fuel and Air System Mon, 11 Sep 2006 21:37:05 -0700 http://www.aegeansoft.com/silverwing/phorum/read.php?25,7411,7411#msg-7411 http://www.aegeansoft.com/silverwing/phorum/read.php?25,7411,7411#msg-7411 _________________]]> joevano Fuel and Air System Fri, 25 Aug 2006 08:49:23 -0700 http://www.aegeansoft.com/silverwing/phorum/read.php?25,7363,7363#msg-7363 http://www.aegeansoft.com/silverwing/phorum/read.php?25,7363,7363#msg-7363
I have an old silvewing which sucks petrol to 4 miles per litter.

Is there any chance I can make it normal eg changing the jerks in the carbs?

Its a nice bike but..


Many thanks.


george]]> gt500 Fuel and Air System Wed, 09 Aug 2006 16:19:18 -0700 http://www.aegeansoft.com/silverwing/phorum/read.php?25,7248,7248#msg-7248 http://www.aegeansoft.com/silverwing/phorum/read.php?25,7248,7248#msg-7248
Cheers,
Sylvain]]> sylvano Fuel and Air System Fri, 25 Aug 2006 08:57:57 -0700 http://www.aegeansoft.com/silverwing/phorum/read.php?25,7214,7214#msg-7214 http://www.aegeansoft.com/silverwing/phorum/read.php?25,7214,7214#msg-7214
Having a problem with carb sync changing through the revs here as well! Except mine is causing engine issues.

Idle - 5000rpm, the carbs are almost perfectly synched (using a differential oil-in-tube gauge). The engine sounds great.

Above 5000rpm, the carbs are notably out of sync and the engine's sound goes from a smooth rumble to a sound more reminiscent of a chainsaw engine. Bad handlebar buzz and everything loose on the bike rattles like it's trying to fall off.

If I drop my idle below 1000, the sync appears to drift as well, and the bike stalls around 900 on the bike tach (I don't have an external tach). The bike is supposed to idle all the way down to 600 with synched carbs, so this also looks odd.

This happened after doing valve clearances/camchain tension/plugs, and then resyncronising the carbs. Should I balance at 5000rpm then, or at idle? And what could be causing it to change?]]> Alex Fuel and Air System Fri, 23 Jun 2006 21:15:40 -0700 http://www.aegeansoft.com/silverwing/phorum/read.php?25,7184,7184#msg-7184 http://www.aegeansoft.com/silverwing/phorum/read.php?25,7184,7184#msg-7184
Does anyone have experience with this product?]]> vdotmatrix Fuel and Air System Fri, 25 Aug 2006 08:56:25 -0700 http://www.aegeansoft.com/silverwing/phorum/read.php?25,7143,7143#msg-7143 http://www.aegeansoft.com/silverwing/phorum/read.php?25,7143,7143#msg-7143
Is it normal for the carb balance to vary like that?

This started out a week ago when I took my fuel petcock apart to fix a minor leak. When I put it back together, the bike was acting like it was fuel starved during heavy acceleration although it was fine while cruising at a steady speed. That problem turned out to be a very dirty air filter. I rode it home from work on Friday with no air filter and the problem was gone. A new filter dropped the power a bit but it's still running good and doesn't act fuel starved anymore. Also on the ride home on Friday, the bike seemed like it wanted to stall at a red light and it "stumbled" on takeoff. I thought it was just running extra lean with no air filter but It's still doing that when it's fully warmed up. The local temperature hit 91 on Friday. I don't know if that has anything to do with it though.

I replaced the spark plugs then checked the carb balance and that's when I discovered the out of balance condition that varies with rpm. I haven't ridden it since I changed the plugs.

Oh yeah, I did drain the tube under the air box. I got quite a bit of muck out of it. The stumble problem is still there.

Thanks for reading this far and I hope someone can offer some advice on the carb sync issue. I didn't want to sync them at idle if there was something else causing the unbalanced condition that varies with rpm.

Thanks,
Ken in Albuquerque]]> kenglong Fuel and Air System Tue, 06 Jun 2006 19:59:00 -0700 http://www.aegeansoft.com/silverwing/phorum/read.php?25,7101,7101#msg-7101 http://www.aegeansoft.com/silverwing/phorum/read.php?25,7101,7101#msg-7101 www.msefi.com]
At the home site click 'usergroups', open the list and click 'motorcycles'.]]> william harris Fuel and Air System Wed, 26 Apr 2006 07:12:18 -0700 http://www.aegeansoft.com/silverwing/phorum/read.php?25,6877,6877#msg-6877 http://www.aegeansoft.com/silverwing/phorum/read.php?25,6877,6877#msg-6877
Can someone point me to the problem?

cheers!

Todd]]> aquilius Fuel and Air System Sun, 29 Jan 2006 13:52:04 -0800 http://www.aegeansoft.com/silverwing/phorum/read.php?25,5385,5385#msg-5385 http://www.aegeansoft.com/silverwing/phorum/read.php?25,5385,5385#msg-5385 Big Daddy Fuel and Air System Wed, 16 Nov 2005 01:10:26 -0800 http://www.aegeansoft.com/silverwing/phorum/read.php?25,5373,5373#msg-5373 http://www.aegeansoft.com/silverwing/phorum/read.php?25,5373,5373#msg-5373
Recently, I had some starter problems with my GL650. In the steps of troubleshooting, I quickly eliminated compression and spark as being part of the problem and went to look at fuel system problems. I have a spare set of carbs and spare petcock. Being easy changes, I changed them out.

When I ultimately identified the starter as the problem and repaired it(nothing more than cleaning and lubricting the darned' thing), I decided to leave the replacement carbs on my bike. In riding, it was easy to see that something was different. Idle RPM, typically around 900 on my tuned carbs hovered around 1100. Vibration which was non-existent on my older carbs was aparent from 2500 RPM on up. Handle bar buzz set in at 4000 RPM. My mirrors actually stareted to work loose. The most telling loss in performance in this experiment was in fuel consumption. Typically, I get between 45 and 52 MPG. With the unbalanced carbs, mileage dropped to 25MPG.

Moral of the story: Take time to synchronize your carbs. It makes a world of difference in performance.

]]> Lewjomo Fuel and Air System Sat, 10 Nov 2007 06:50:35 -0800 http://www.aegeansoft.com/silverwing/phorum/read.php?25,5352,5352#msg-5352 http://www.aegeansoft.com/silverwing/phorum/read.php?25,5352,5352#msg-5352 bowman91 Fuel and Air System Sat, 22 Oct 2005 16:47:21 -0700 http://www.aegeansoft.com/silverwing/phorum/read.php?25,5219,5219#msg-5219 http://www.aegeansoft.com/silverwing/phorum/read.php?25,5219,5219#msg-5219 Thanks,]]> fiatvhs2 Fuel and Air System Wed, 17 Aug 2005 18:56:22 -0700 http://www.aegeansoft.com/silverwing/phorum/read.php?25,5134,5134#msg-5134 http://www.aegeansoft.com/silverwing/phorum/read.php?25,5134,5134#msg-5134
Now she won't idle, she'll run very roughly for a moment and eventually kick out. and half the time when I rev up, she just kicks out completely.

What have I probably messed up here? Is it probably as simple as needing new seals? (I reused the old ones, they seemed perfectly fine) Or have I more likely jacked up something or another in the process that might not be immediately obvious?

I changed one of the boots back to the original, no change. In the morning when it's light out again, I'll change the other one back as well and see if that does anything, but I am doubting it so far.]]> Sam Fuel and Air System Sat, 27 Aug 2005 22:59:38 -0700 http://www.aegeansoft.com/silverwing/phorum/read.php?25,5118,5118#msg-5118 http://www.aegeansoft.com/silverwing/phorum/read.php?25,5118,5118#msg-5118
I have owned this for 3 months and have been using 91 octane. I always get betwen 45 and 52 MPG.]]> r2473 Fuel and Air System Tue, 06 Jun 2006 20:01:30 -0700 http://www.aegeansoft.com/silverwing/phorum/read.php?25,5025,5025#msg-5025 http://www.aegeansoft.com/silverwing/phorum/read.php?25,5025,5025#msg-5025
I finally have my bike back together and purring like a kitten- 5 weeks later. But The original oil leak and seveal other problems are no more- Yeah!

New Problem- I have a steady stream of fuel draining down from the bottom of the carb. The fuel tank valve did not leak - on or off position, and the fuel runns well when the vacuuum hose is applied and the engine cranked. I cant figure out how to stop the fuel from running out.

As Always - all help is greatly appreciated.]]> Frank in Michigan Fuel and Air System Sat, 13 May 2006 14:58:26 -0700 http://www.aegeansoft.com/silverwing/phorum/read.php?25,5018,5018#msg-5018 http://www.aegeansoft.com/silverwing/phorum/read.php?25,5018,5018#msg-5018 ranch2241 Fuel and Air System Wed, 25 May 2005 18:21:39 -0700 http://www.aegeansoft.com/silverwing/phorum/read.php?25,4913,4913#msg-4913 http://www.aegeansoft.com/silverwing/phorum/read.php?25,4913,4913#msg-4913
Now she starts fine, but upon warm up and zero choke, idle speed drops too low (about 800 indicated) and there's a definate hesitation when cracking the throttle. I checked the air filter, and it's awful...no front foam seal, and really dirty. I've ordered a replacement from OBB. Could it be air starvation, or possibly gummy/varnished jets? Even old gas maybe? Water in the gas?

Thanks!

David]]> David Bunch Fuel and Air System Sun, 08 May 2005 04:14:15 -0700 http://www.aegeansoft.com/silverwing/phorum/read.php?25,4898,4898#msg-4898 http://www.aegeansoft.com/silverwing/phorum/read.php?25,4898,4898#msg-4898 49k miles

Engine runs normally for about 20 miles on open road (40-60mph), then suddenly accelerates and runs exceptionally well! Power and acceleration are commendable, but closed throttle now results in engine coughing. This is not what I call a backfire (this comes out the exhaust) or post detonation as it is rather mild and subdued. It first occured in right exhaust and later seemed to also occur in left. There is an increase in exhaust pressure at tailpipe during cough. Opening throttle even a little eliminates problem. Haynes Manual suggests that an airleak in the exhaust could result in "popping and crackling" in the exhaust on "rolloff". This sounds close but on disassembly of exhaust system could find no obvious source of airleak at either head or either tailpipe junction. Asbestos seals still look good.

Has anyone had a similar instance beside Mike in Florida (spitting & sputtering) in November? Mike's problems didn't sound quite like mine.

I was picking the m/c up from purchase and returned it 100 miles home and was told that it runs rough or backfires by previous owner. This seems a little different to me since it came on suddenly for me, yet is a repeat problem from three owners ago. The symptoms indicate to me that with great open throttle response and rough/noisy closed throttle operation, that the timing is somehow getting too far advanced for slow ignition during operation. Is that possible on this engine?

Brian
Chicagoland]]> Brian FORD Fuel and Air System Mon, 25 Apr 2005 03:07:32 -0700 http://www.aegeansoft.com/silverwing/phorum/read.php?25,4884,4884#msg-4884 http://www.aegeansoft.com/silverwing/phorum/read.php?25,4884,4884#msg-4884
Ray]]> rayman Fuel and Air System Tue, 19 Apr 2005 16:25:48 -0700 http://www.aegeansoft.com/silverwing/phorum/read.php?25,4784,4784#msg-4784 http://www.aegeansoft.com/silverwing/phorum/read.php?25,4784,4784#msg-4784
Sean]]> Sean W Cooney Fuel and Air System Sun, 28 Jan 2007 06:23:02 -0800 http://www.aegeansoft.com/silverwing/phorum/read.php?25,4706,4706#msg-4706 http://www.aegeansoft.com/silverwing/phorum/read.php?25,4706,4706#msg-4706
Any advice?

Thanks!]]> Sam H. Fuel and Air System Sun, 30 Jan 2005 15:32:14 -0800 http://www.aegeansoft.com/silverwing/phorum/read.php?25,4670,4670#msg-4670 http://www.aegeansoft.com/silverwing/phorum/read.php?25,4670,4670#msg-4670
One of them was that I did not pay attention to the difference between the main and secondary jets.

One of them as a slightly larger diameter hole, but they both have the same thread size and will fit in either place.

My question is which has the large hole and which has the small?

I have a 50/50 change of getting it right but I'm not fealing lucky.

My guess would be the large diameter one is the main.

Thanks for you help,

eugene]]> eugene Fuel and Air System Mon, 06 Dec 2004 09:45:53 -0800 http://www.aegeansoft.com/silverwing/phorum/read.php?25,4618,4618#msg-4618 http://www.aegeansoft.com/silverwing/phorum/read.php?25,4618,4618#msg-4618
I make it home, go to sleep, and do some tests this morning. I put in some new plugs I had bought last week as well. There's also an oil loss problem and I added more oil to get the level back up a few days ago. I then go out and ride, and make some notes.

In 4th gear, I move along perfectly normal, up until about4400-4500 rpms, then she suddenly seems to lose power. she's saying "I just can't push any harder" Feels like my mother's escort when I try to speed up to pass on the freeways. but then I drop back to 42-4300rpms, and she just peps along as if nothing had happened.

I downshift to third. I get the same thing at 5000 rpms. I move back to the normal streets and get the same thing at around 6500 in 2nd.

I then head home. I do some more checking over. Oil level is fine. I notice a lot of heat from the whole of the engine block, which I don't recall from the past, although I've seldom actually bend down by the engine like this right after riding, so it may be nothing. I then check the coolant. The reserve is entirely empty. (although I seem to recall something in the past about coolant not being in the reserve right after riding, but it suddenly appearing again when I returned a few hours later.. this may occur again here.) I know it was fine just a couple of weeks ago. and I did not have any temperature problems while riding, the gauge was the same as usual.

based upon the above notes, any ideas of what may be the cause of this? I am hoping it may be as simple as a loose throttle cable, which I intend to check as soon as I have a little more time free, but I'd like as many other opinions as possible first.

Thanks!

Sam]]> Sam H. Fuel and Air System Sun, 21 Nov 2004 06:21:26 -0800 http://www.aegeansoft.com/silverwing/phorum/read.php?25,4596,4596#msg-4596 http://www.aegeansoft.com/silverwing/phorum/read.php?25,4596,4596#msg-4596 Mike in Florida Fuel and Air System Sun, 05 Dec 2004 20:04:37 -0800