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SuzukiSavage.com
/cgi-bin/YaBB.pl General Category >> Rubber Side Down! >> Problems on start-up and for first 5 miles /cgi-bin/YaBB.pl?num=1630413236 Message started by GothicKate on 08/31/21 at 05:33:56 |
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Title: Problems on start-up and for first 5 miles Post by GothicKate on 08/31/21 at 05:33:56 Hi, I am in the UK. I recently bought a 2005 Suzuki S40 650 - an American import, form Georgia (GA) I believe. Just over 9000 miles on the clock. Suzuki S40/Savages are unobtainable in the UK - have been for some years. I had to send it back to the dealer twice for attention - very bad backfiring and very loud silencer. The dealr rebuilt the top of the cylinder (so they say!) The bike runs okay once it’s well warmed up, but stutters and misfires when first started up, unless at least half choke kept on for first 5 miles, then it smooths out. If you push in the choke fully too soon, it misfires and sputters. The dealer say they did the followin work on it: Brand new cam chain tensioner – one of the later, better ones; Cylinder head has been rebuilt with two new exhaust guides – genuine Suzuki ones, the cylinder head was sent away to a specialist, head warmed up , old ones pressed out and and new ones pressed in; When they stripped down the bike this time, they noticed it was damp around one of the guides on the exhaust side, so replaced both exhaust guides; Genuine new head gasket; Yamaha exhaust to replace the old one which was causing the bike to backfire and was very loud, as the previous owner in the U.S. had removed the baffles; New cylinder rings New rubber plug on cylinder head What I am asking is this: is this sort of problem on firsst start up and for first 5 miles common? Is there any way to cure it? |
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Title: Re: Problems on start-up and for first 5 miles Post by verslagen1 on 08/31/21 at 06:50:30 68405B47464C644E5B4A2F0 wrote:
I like the older ones better, lighter spring. Otherwise, no difference. The bike is cold, why wouldn't you need a little choke to help warm it up? It's not efi. |
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Title: Re: Problems on start-up and for first 5 miles Post by Gary_in_NJ on 08/31/21 at 07:58:29 I hate to say it Kate, but I think your mechanic is either incompetent or soaking you for cash. Your problems sound like jetting that is too lean - that's all. Please tell me that the backfiring wasn't the reason for the head rebuild? |
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Title: Re: Problems on start-up and for first 5 miles Post by Eegore on 08/31/21 at 08:15:12 First I would stop using the dealer for this issue. Second start working on carb - fuel related tuning. Other's here will have the specifics on what jetting you might need given your current altitude, and then go from there. This is an informative post about the carb: http://suzukisavage.com/cgi-bin/YaBB.pl?num=1098869040 |
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Title: Re: Problems on start-up and for first 5 miles Post by GothicKate on 09/01/21 at 04:13:53 Thanks for the replies from Gary and Eegore, which were helpful. No, the poor running on start up and for first five miles or so is not just because the engine is cold. I have been riding bikes since the early 1970s, and plenty of bikes with carburettors and chokes, so know how a bike should run and when it's not quite right. Yes, the problem is almost certainly running too lean and a re-jetting is needed, and I am taking it into a really fantastic bike mechanic locally on 16th September who is going to look at re-jetting it. Yes, the original problem for which it went back to the dealer twice was very serious bad-firing and silencer that was too loud because the previous U.S. owner had taken the baffles out. I did not pay the dealer anything extra for when it went back to them and they picked it up for free (twice) and took it back to the other side of the Pennines (and in fact it's still under their 3 month warranty). They DID rebuild the cylinder head and replace the exhaust valve liners, etc., as described. They've tried twice to sort it out, and so there is not much point in sending back to them again, so I'm trying my local bloke for the re-jetting. Meanwhil I am buying a brand new Royal Enfield Meteor - had a test ride on one - they are terrific bikes, refined 2021 engineering. :) Thanks for your help, guys. |
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Title: Re: Problems on start-up and for first 5 miles Post by justin_o_guy2 on 09/01/21 at 07:42:15 I'm in East Texas. First start of the day, summer time, it's gonna want the choke. If it's not that, why is it okay after five miles? Your experience is valid. You think the same way I did. Once I stopped trying to make the bike live up to my expectations and just gave it what it wanted,, stuff got better. You're probably jetted a little lean. 9,000 miles and injured? What could cause that? Don't let it idle on the sidestand. The cam won't get oiled on the high end. The barking exhaust and lame running sound like jetting,, and if you can get the bowl off,you can swap jets with the carb on the bike. Not#2 Phillips. It's a Japanese thing,, JAS,?? I don't remember, but the screw heads Will strip ,,once they are out ,get allen head bolts, Antiseize is your friend. |
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Title: Re: Problems on start-up and for first 5 miles Post by ohiomoto on 09/01/21 at 13:35:01 59716A76777D557F6A7B1E0 wrote:
Yes, this is completely normal. My bike takes a good 7-8 miles of riding with the enrichment knob pulled halfway out. This is normal and it's the exactly the reason they put an enrichment/choke on the carburetor. |
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Title: Re: Problems on start-up and for first 5 miles Post by Gary_in_NJ on 09/01/21 at 17:47:42 I don’t know, as soon as my bike fires I remove the choke. By the time I’ve ridden a 1/2 mile throttle response is completely normal. That’s true for the 650 and another 20+ carb’d bikes I’ve owned. Proper jetting is crucial to proper running |
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Title: Re: Problems on start-up and for first 5 miles Post by jcstokes on 09/01/21 at 18:24:53 You are at or neatr the begining of the UK autumn, you certainly shouldn't need five miles of full enrichment/choke at that time of the year. In mild by US/UK standard NZ winters I use two or three miles of enrichment/choke. Upon starting the bike I generally push the button halfway in, have you tried this method. I note you had a new rubber plug in the cylinder head. It may pay you to investigate the Verslagen aluminium and O ring version. Some are saying the mechanic ripped you off, maybe, but when they see oil on the block, they will tend to make assumptions about head gaskets. check the technical info on this site for jetting issues. My bike is pretty bog stock and I've had 94000 plus kms 58000 miles without serious issues. |
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Title: Re: Problems on start-up and for first 5 miles Post by justin_o_guy2 on 09/02/21 at 03:33:39 Should and shouldn't aside,if using the choke for longer than you wish it needed Solves the Prahblum, I thought it was completely unreasonable to have to use choke on summer morning,, But THAT IS WHAT WORKED,, Would jetting help? Probably..? The bikes aren't exactly the same. They just don't act alike. Similar, sometimes.. I'd spend some time reading about the jetting and white washer mods. Make sure you have the right tools Then go into it and see if you can make it better. I did all of it. Cam, jetting,Supertrapp exhaust, ran flipping GREAT!! But the First start of the day,, it demanded choke,, I discovered that adjusting the idle up helped, but after twenty minutes it was just too high.. It's a stone age design with a carburetor. Do what It wants Have fun |
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Title: Re: Problems on start-up and for first 5 miles Post by zipidachimp on 09/02/21 at 13:28:18 +1 for Gary ! Cheers! 8-) |
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Title: Re: Problems on start-up and for first 5 miles Post by Hiko on 09/02/21 at 16:06:58 Justin O Guy Wrote Quote:
Which is one of the main reasons I like it so much :) |
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