SuzukiSavage.com - 1987 Savage Street Tracker build

Gary_in_NJ Serious Thumper Offline LS650 Cafe Racer Posts: 2642 Amongst the Twisty Roads	Re: 1986 Savage Street Tracker build Reply #240 - 11/26/21 at 13:55:56 My advice, port and polish the head as described by Mike, and replace the position with the 94mm flat top. Now is the time.
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TheSneeze

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Re: 1986 Savage Street Tracker build
Reply #241 - 11/26/21 at 15:08:31

I ordered the DR cam, late model rockers, and a low cost valve spring compressor. Leak test with alcohol is underway. The rim of one exhaust and one intake valve show a light amount of "wet", but not enough to run down the port. It will be next week before the valve spring compressor shows up. Maybe just lapping the valve seats will suffice? We will see if the guides are worn past the limit after I get the valves out.

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Every twenty minute job is a stripped thread away from being a three day ordeal.

'87 LS650h Savage Street Tracker (destroyed by fire)
'86 LS650g Savage (parts bike)
'81 Kawasaki KZ750e ELR tribut

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TheSneeze

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Re: 1986 Savage Street Tracker build
Reply #242 - 11/26/21 at 16:19:10

Three out of four valves are showing signs of leaking. The two exhaust valves have a damp ring around the valve seat edge. The right intake valve is the worst, it has a trail of fluid down the port to the intake boot, leaving a puddle there. I'm not going to consider only a lap at this point. If it's coming apart this far might as well just do the whole valve job.

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Every twenty minute job is a stripped thread away from being a three day ordeal.

'87 LS650h Savage Street Tracker (destroyed by fire)
'86 LS650g Savage (parts bike)
'81 Kawasaki KZ750e ELR tribut

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TheSneeze Serious Thumper Offline Posts: 1313 Northern Nevada Gender:	Re: 1986 Savage Street Tracker build Reply #243 - 11/26/21 at 16:19:35 intake
Back to top	20211126_1615481.jpg Every twenty minute job is a stripped thread away from being a three day ordeal. '87 LS650h Savage Street Tracker (destroyed by fire) '86 LS650g Savage (parts bike) '81 Kawasaki KZ750e ELR tribut IP Logged

Dave

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Re: 1986 Savage Street Tracker build
Reply #244 - 11/27/21 at 02:28:17

Before you take the valves out.....consider cleaning off the carbon this way. You can level up the head and clean the combustion chamber.....then turn it over and clean the exhaust port by filling it up.

https://www.youtube.com/watch?v=voe-ZcKjg4Y&t=17s

https://www.youtube.com/watch?v=IEyus9alwIY

https://www.youtube.com/watch?v=bRiZOTTel34

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Someday I will be old......But not today!

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DragBikeMike

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Re: 1986 Savage Street Tracker build
Reply #245 - 11/27/21 at 13:19:06

Cool info on the carbon removal Dave. Thanks. I'm gonna see if I can find any of that Berryman's dip.

Sneeze, it's interesting that the leakdown test done with air showed big leaks at the exhaust valves, but the leak test done with alcohol revealed the intakes to be the leakers. I can't wait to see what you find when you get those valves out. Is it possible that the exhaust valves were adjusted too tight when you did the air test, or the engine was possibly at TDC on the exhaust stroke?

Your test medium (alcohol) is about as non-viscous as you can get. It would be pretty hard to get a perfect seal with alcohol.

I see you have valves with reduced diameter stems. I found those on the eBay head I used for my last project. Never had seen them before. Now here we see them again. Cool. Hang on to those if they are in good condition. As I recall, the intakes seem to flow a bit better.

Hey Gary, 36s on a 400. Killer. No wonder they get so much power out of those dirt scoots. Three-millimeter larger intakes, 250cc smaller engine, 17 more HP. What's not to like about that? Wink

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TheSneeze

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Re: 1986 Savage Street Tracker build
Reply #246 - 11/27/21 at 13:26:46

I verified that all the tappets were loose when doing to leak down compression test, so no pressure was on the valves. I also verified the timing marks, and physically verified the piston was at TDC. I could barely feel anything coming out the intake boot, but could definitely feel airflow coming out the exhaust port (and hear it, too!). I was quite surprised to see that flow out the intake valve, and very little out the exhaust. I should have no problem finding that parts dip here in Nevada. They aren't very strict on chemical sales in this state. Valve spring compressor is arriving next Wednesday, as is the carburetor. Cam and rockers do not have an ETA established yet.

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Every twenty minute job is a stripped thread away from being a three day ordeal.

'87 LS650h Savage Street Tracker (destroyed by fire)
'86 LS650g Savage (parts bike)
'81 Kawasaki KZ750e ELR tribut

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TheSneeze Serious Thumper Offline Posts: 1313 Northern Nevada Gender:	Re: 1986 Savage Street Tracker build Reply #247 - 11/27/21 at 13:29:26 If the exhaust valves were even partially open I doubt I would have seen only 60% loss at 30 psi. It would have been 100% loss and wouldn't have built any pressure at all. That's my view, and I am sticking to it!
Back to top	Every twenty minute job is a stripped thread away from being a three day ordeal. '87 LS650h Savage Street Tracker (destroyed by fire) '86 LS650g Savage (parts bike) '81 Kawasaki KZ750e ELR tribut IP Logged

TheSneeze

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Re: 1986 Savage Street Tracker build
Reply #248 - 11/27/21 at 14:46:08

This is the carb that came with my bike (not on it). It was still connected to the throttle and right switch controls though. I assume this is the stock carb for an '87 Savage? The only marking is the Mikuni Corp. on one side, and a partial Made in Japa on the other. No numbers or identifiers. The ID of the intake side is 40mm - model should be BS40SS per the fsm. I dug it out of my parts shelf to check the OD for comparison on the PWK40 I bought. This carb is 48mm OD at the boot. The PWK40 is listed at 46mm OD at the boot. Are there different diameters of PWK40's? Is the OD on the new carb going to work with the stock boot (I have a new one)?

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Every twenty minute job is a stripped thread away from being a three day ordeal.

'87 LS650h Savage Street Tracker (destroyed by fire)
'86 LS650g Savage (parts bike)
'81 Kawasaki KZ750e ELR tribut

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TheSneeze Serious Thumper Offline Posts: 1313 Northern Nevada Gender:	Re: 1986 Savage Street Tracker build Reply #249 - 11/27/21 at 14:46:47 boot side
Back to top	20211127_1434031.jpg Every twenty minute job is a stripped thread away from being a three day ordeal. '87 LS650h Savage Street Tracker (destroyed by fire) '86 LS650g Savage (parts bike) '81 Kawasaki KZ750e ELR tribut IP Logged

TheSneeze Serious Thumper Offline Posts: 1313 Northern Nevada Gender:	Re: 1986 Savage Street Tracker build Reply #250 - 11/27/21 at 14:47:09 side
Back to top	20211127_1434181.jpg Every twenty minute job is a stripped thread away from being a three day ordeal. '87 LS650h Savage Street Tracker (destroyed by fire) '86 LS650g Savage (parts bike) '81 Kawasaki KZ750e ELR tribut IP Logged

TheSneeze Serious Thumper Offline Posts: 1313 Northern Nevada Gender:	Re: 1986 Savage Street Tracker build Reply #251 - 11/27/21 at 14:47:29 filter side
Back to top	20211127_1434301.jpg Every twenty minute job is a stripped thread away from being a three day ordeal. '87 LS650h Savage Street Tracker (destroyed by fire) '86 LS650g Savage (parts bike) '81 Kawasaki KZ750e ELR tribut IP Logged

TheSneeze Serious Thumper Offline Posts: 1313 Northern Nevada Gender:	Re: 1986 Savage Street Tracker build Reply #252 - 11/27/21 at 14:56:34 If this is the stock carb, there is a 1mm interference with the boot ID. The new carb with have a 1mm gap. I think I may have bought the wrong carb.
Back to top	Every twenty minute job is a stripped thread away from being a three day ordeal. '87 LS650h Savage Street Tracker (destroyed by fire) '86 LS650g Savage (parts bike) '81 Kawasaki KZ750e ELR tribut IP Logged

TheSneeze Serious Thumper Offline Posts: 1313 Northern Nevada Gender:	Re: 1986 Savage Street Tracker build Reply #253 - 11/27/21 at 19:06:08 I went back and re-read some of DragBikeMike's carb thread, and found that with the right clamp it will work fine. Didn't sink in the first time I read it. My wife says I have two main faults. I don't listen, and some other thing...
Back to top	Every twenty minute job is a stripped thread away from being a three day ordeal. '87 LS650h Savage Street Tracker (destroyed by fire) '86 LS650g Savage (parts bike) '81 Kawasaki KZ750e ELR tribut IP Logged

TheSneeze Serious Thumper Offline Posts: 1313 Northern Nevada Gender:	Re: 1986 Savage Street Tracker build Reply #254 - 11/30/21 at 10:32:08 Spring compressor arrived earlier than expected. The head will be disassembled and the cylinder and piston removed today. Pics to follow later!
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