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Help!
09/16/15 at 13:37:58

So I just picked up a 2007 s40 got a good deal on it as it was not running. No spark so cked the coil it was bad. Installed new coil now I have good spark but still will not start. I have fuel and even tried to start with carb cleaner ( this always worked for me in the past) it suckling in the carb and blowing out the exhaust. I'm very lost at this point. It did do a very light backfire I mean very light the compression seems ok. Any ideas would be great. Thanks guys!

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Dave YaBB Moderator ModSquad Offline SuzukiSavage.com Rocks! Posts: 18098 Camp Springs, Kentucky Gender:	Re: Help! Reply #1 - 09/16/15 at 13:53:13 What makes you think it has compression? Did you test it with a gauge? The symptoms you described....sure sounds like there is a compression problem. Confirm that the decompression lever is working as it should....it should pull up for a brief second, then go back to horizontal once the engine has turned over once or twice.
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Jweintraub YaBB Newbies Offline SuzukiSavage.com Rocks! Posts: 17	Re: Help! Reply #2 - 09/16/15 at 14:00:29 Cked compression with gauge it read 145. Is that in spec?
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Dave YaBB Moderator ModSquad Offline SuzukiSavage.com Rocks! Posts: 18098 Camp Springs, Kentucky Gender:	Re: Help! Reply #3 - 09/16/15 at 14:45:35 That should be enough for it to start. Instead of carb cleaner.....try a small amount of gasoline. You can squirt it down the vacuum line for the petcock. If you have compression, spark and fuel....the only other issue is timing?
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thumperclone Serious Thumper Alliance Member Offline PGR rider riding with respect Posts: 6061 Grand Junction Colorado Gender:	Re: Help! Reply #4 - 09/16/15 at 14:45:36 Jweintraub wrote on 09/16/15 at 14:00:29: Cked compression with gauge it read 145. Is that in spec? standard is 142 -200 psi limit 114 psi
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Jweintraub

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Re: Help!
Reply #5 - 09/16/15 at 15:40:03

Thanks for the help guys. When I get off in the morning I'm going to go get a new gauge and ck the compression one more time. (Mine is very old) then if that cks I'll pull the plug and try a few drops of gas. If still no go I'll move to the timing. I'll most likely need help on the timing process for this bike. This is my first suzuki ever I've always had Hondas but I really like this little thing.

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justin_o_guy2

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Re: Help!
Reply #6 - 09/16/15 at 18:45:35

How long did it sit?
Might wanna be sure everything is oiled. Engines that sit too long can be damaged by startup.
Hopefully you realized that the plug sits in a cavity, catching crap to drop into the cylinder.
You may have spark with the plug against the engine, but with the load on the starter from compression, you may not. A multimeter, monitoring battery voltage,, the igniter requires a HOT battery. Someone knows what the voltage is.
You can pull the plug wire and use another plug. Then you'll see if it is pulling the load
And
Sparking.

How many miles on it?
Tank rusty?
Drain the carb bowl into a clear container ?

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Jweintraub

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Re: Help!
Reply #7 - 09/17/15 at 01:56:15

So the bike sit for about 9 weeks. FuEl tank is clean no rust as is the carb. I did "prime" the cylinder before I tried to start it. It has 28k on it and I cked for spark with the old plug in the head. In a bout 2 hrs I'll be re cking the compression with the new gauge, I'll post finding as I get them. Thanks guys. Also does this year bike have the same cam chain problem?

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Steve H Serious Thumper Offline SuzukiSavage.com Rocks! Posts: 1223 Spartanburg, SC Gender:	Re: Help! Reply #8 - 09/17/15 at 03:59:17 All years have the same cam chain issues.
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Dave

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Re: Help!
Reply #9 - 09/17/15 at 04:02:10

Jweintraub wrote on 09/17/15 at 01:56:15:

Also does this year bike have the same cam chain problem?

The cam chain and tensioner are the same for all years.....no factory changes. They all need your attention....and at 28,000 it is far overdue to be checked. One member on our forum did go that long without any issues - but he rode long distances regularly and that seems to be easier on the chain than making short trips.

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Jweintraub

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Re: Help!
Reply #10 - 09/18/15 at 13:13:43

OK guys compression cks good with 3 different testers getting good spark. Getting fuel (put some gas in the plug hole) and nothing more than a but of back fire thought the carb. Pulled the muffler thinking maybe to much back pressure that's when it started back firing through the carb. I'm lost now. Plug was not covered with fuel so it's not flooded. Tried in choke and out. If the valves are out of spec would it cause this? I mean I know I'd they were way out it would. Also I don't here any grinding or chain slap like the cam chain is out. I don't really want to pull the cover as it'll take 5 days to get the new gasket for it. Any ideas on what to try next. I can't find a timing procedure anywhere. How do you ck the timing on this bike? Thanks for all the help

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youzguyz Serious Thumper Offline Posts: 2538 San Antonio, Texas Gender:	Re: Help! Reply #11 - 09/18/15 at 13:21:04 Here is how to check the "timing" http://suzukisavage.com/cgi-bin/YaBB.pl?num=1278347767 You have to remove the valve adjustment covers and timing cover. You don't (or shouldn't) need new gaskets for any of them.
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justin_o_guy2 Serious Thumper Offline What happened? Posts: 55279 East Texas, 1/2 dallas/la.	Re: Help! Reply #12 - 09/19/15 at 23:12:06 Either.. Squirt under the seat.Or access the air filter..be sure. Just a little. Check voltage,,
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Re: Help!
Reply #13 - 09/20/15 at 18:43:31

Well timing checked out good. Did a leak down test and its not holding compression at all and the more I ck it the lower the compression drops. So I did a little test and poured about 2 oz of oil right in the plug hole and bingo compression shot up from 135 to 180 so this means that the rings are not sealing(right?) I've pulled the motor from the frame and I'm going to pull the heads and jug this week and see what I have. Anyone got a good place to order parts from?

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justin_o_guy2

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Re: Help!
Reply #14 - 09/20/15 at 19:06:54

so, it had compression, and you squirt stuff in, no start, less compression, and conclude
Rebuild.
The oil is wiped off from trying to start.
Check the cam tensioner.
Get a Hot battery on it. It's got enough compression to run. Get it going before you start dumping money in it. 28,000 is nothing.
Guys here with over 100,000.
It's cam chain checking time.
Get some ether. Access the intake, give it a little shot.
Stand it up, and hit the button.

It's possible that the jug Is damaged, from sitting, dry cranking, but I'd sure let it prove it before I went digging.

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