Author Topic: Well I'm back with a new project. (Read 16342 times)

westhewelder · « **Reply #50 on:** August 18, 2017, 09:25:11 PM »

plan this weekend is to dig out some parts make some brackets for the lights i have because i need to use the stock ones, i have a mostly complete parts motor on the way sunday. so i can finish that up and i need to order a few other parts cables carb boots etc.

westhewelder · « **Reply #51 on:** August 19, 2017, 07:30:17 AM »

I don't have a purge rig but that's not too hard

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westhewelder · « **Reply #52 on:** August 21, 2017, 11:58:06 AM »

So ended up getting the motor together feels like there is some binding though I can get a half rotation and that's all. Here are some pictures.

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westhewelder · « **Reply #53 on:** August 22, 2017, 08:24:40 PM »

Went to go do the valve adjustment I think this bike is cursed...

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754 · « **Reply #54 on:** August 22, 2017, 09:52:33 PM »

That Might polish .. but clean the oil passages.

westhewelder · « **Reply #55 on:** August 23, 2017, 04:52:35 AM »

Cam is fine it's the snapped off bolt next to it from torqing the bolts down

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westhewelder · « **Reply #56 on:** August 25, 2017, 08:06:36 PM »

Cleaned up today I'm not sure about you guys but my shop tend to get chaotic when I'm working. I think it's time to invest in a service trolly to contain the mess.

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westhewelder · « **Reply #57 on:** August 26, 2017, 11:25:08 AM »

Do they sell those at home depot?

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westhewelder · « **Reply #58 on:** August 26, 2017, 08:16:28 PM »

I'll have to check next time damn didn't see any consumer grade on the shelf.

So here's an update pic.

Wiring harness is mostly done. Need a headlight bucket.
Have to build a battery and component tray. Adjust valves. Ignition switch. Chain *need to figure out size and type.

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westhewelder · « **Reply #59 on:** September 10, 2017, 11:07:02 AM »

ok so ive been working on the wiring and getting this bike started ended up getting a putter for a start and that shows signs of life. might have to do some work on the timing. but i have a few questions.

1. where my blinker relay comes out for the wiring harness i have 3 wires as to what the wiring diagram shows which is only two a gren and a green and white, but i also have a grey wire. i can not figure out if this is correct or if the wiring diagram is somehow different maybe for a 80,81?

2.i have some wires this are coming out of the front of the harnes by the headlight it has a two green, double grey and a black. are this ground and 2nd wires for the the signals? i thought white and blue and white and orange were power to signals are green the ground and black is ground and grey is to power to the second filament?

westhewelder · « **Reply #60 on:** September 10, 2017, 05:28:32 PM »

Sorry I was intending on posting pictures. First picture is by the battery second picture is up by the headlights

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westhewelder · « **Reply #61 on:** September 10, 2017, 08:22:17 PM »

So this is fun. I couldn't find out why the engine wasn't firing feels like no compression in cylinder 4 no idea what's causing it but I do know it sounds like a weak suction cup letting go of a surface? Going to get a compression tester and go through the cylinders.

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westhewelder · « **Reply #62 on:** September 11, 2017, 09:30:22 PM »

So cylinder 1 is 100 cylinder 2 is 91 cylinder 3 is 50 and cylinder 4 is maybe 20? Weaker then a mouse fart.

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jgger · « **Reply #63 on:** September 11, 2017, 10:47:04 PM »

Squirt a little oil in each plug hole and re test. If the motor has not been run in awhile, it could be stuck rings. The oil will make a temporary seal and raise the compression .

You are checking compression with the throttle wide open, right? If not re test with the throttle open, then do a wet test. If there is little to no change in the numbers then the issue is in the valves or head gasket.

westhewelder · « **Reply #64 on:** September 12, 2017, 10:00:07 AM »

Had a full battery with a booster pack oil in the engine I even backed off the rockers to let them stay closed

I did not do it with throttle open I couldn't see what that would change. Haven't done a wet test yet. Brand new head gasket. My guess is the valves it's making some sort of popping noise. Like a suction pop.

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jgger · « **Reply #65 on:** September 12, 2017, 12:21:04 PM »

You need to readjust the rockers and run the test again, dry first then wet (oil in the CYLINDERS).

Loose rockers=no air in= no compression.

westhewelder · « **Reply #66 on:** September 12, 2017, 09:14:42 PM »

Ok will re adjust the rockers. I had them all adjusted when I did the initial reading and those were the numbers I got. I will re adjust them back start with taking the carbs off entirely and then do a wet test.

Also just to confirm when you do your adjustment you start with 1.4t then rotate one full turn and adjust the remaining valves. Is that only for cylinder 1-4 or is that across the board all of them?

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MetroRedneck · « **Reply #67 on:** September 14, 2017, 03:35:36 PM »

Start at 1.4 and do 1,3 intake and 1,2 exhaust. Rotate one full turn to 1.4 and do 2,4 intake and 3,4 exhaust.

Grab the manual chapter 3.

Nice 650 - I have a 79. Someone mentioned battery and capacity. I'm using a LiFePo with no issues. Always ready to go and I rarely ride more than 15 minutes.

westhewelder · « **Reply #68 on:** September 14, 2017, 09:36:46 PM »

Yup. Dug into my head and the valve seats need to be redone for sure should solve my issue with poor compression. Ya ya get to put the engine together a third time. Teaches.me for taking short cuts..

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jgger · « **Reply #69 on:** September 14, 2017, 09:50:01 PM »

Good that you found it........sucks what you need to do to fix it!

westhewelder · « **Reply #70 on:** September 15, 2017, 05:13:23 AM »

On the bright side I'm going to know this engine really well lol

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MetroRedneck · « **Reply #71 on:** September 15, 2017, 07:40:22 AM »

I'm not a fan of the tappet covers and the way the gaskets fit. Last time I had mine apart I went ahead and re-threaded the cover holes so I could actually get them tight enough to not leak.

westhewelder · « **Reply #72 on:** November 21, 2017, 04:03:19 PM »

So just an update a few things going on not too much been busy with the kz440 bike we are flipping. And some family issues.

But anyways got a new tach speedo combo to eliminate the clunky old gauges. Started to remove the tabs on the frame cleaning that up some holes to fill yet. Might clean up the wiring and working on a component tray.

Might blow the motor apart again still getting compression issues on cylinder 2 and 4 75 psi compression while 1 and 3 have 100psi.

Looking for a good set of levers and master cylinder since my rebuild kit is 80$ I can buy new levers for 150ish. Now pcs for all that are interested

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westhewelder · « **Reply #73 on:** November 21, 2017, 04:04:38 PM »

More pictures

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westhewelder · « **Reply #74 on:** November 21, 2017, 07:53:27 PM »

So a question about doing the rear hoop I found a previous topic stating that the rear suspension bottoms out at 91mm of travel is that height of tire vertically or is that shock compression. I want to do a brat seat because it could accomedate 2 riders if need be. Am I doing this correctly if the stock dimension stud to stud is 340mm and I set it to 250mm would that give me the room I need. If so I don't see the point of this mod as bottoming out would be fairly likely.

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Author Topic: Well I'm back with a new project. (Read 16342 times)