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Bike wont start after full rebuild

By | 09.10.2020

By crotch-rocketeerDecember 14, in Bike Related Discussion. Seeing as I just rebuilt it and have replaced everything not sure what the problem could be, obviously i'm no mechanic. If compression is low the piston ring could be stuck in the ring groove. It happens a bit on two bangers. Testing plug is as simple as removing it and sitting it on the head and giving it a kick. If the plug is wet it will be oil fouled and it won't spark. Saying it's new doesn't prove it still works.

It may have oil fouled during your short ride Compression it should be way harder to kick than before the rebuild. Resistance felt on the foot. Best way is to use a compression tester that reads in psi or kpa in the plug hole.

If you don't have one you have to rely on feel Sell it buy a 4 stroke!!!! Check your spark is good enough then work yourself backwards from there to the next thing in line. Check all connections in the wiring and any plugs, it wont take much to have a bad connection somewhere. Make sure you haven't done anything silly like leave the air filter in the shed whilst you were rebuilding it and forgot to reinstall it.

I'm waiting on a reply from Kogan.

bike wont start after full rebuild

Did you make sure the piston sizes are the same? Maybe try roll starting it. Check all your leads also to check that they havnt been dislodged from connectors etc. How fast does it flow to the carby if you pull the line and let it spit out? You can post now and register later. If you have an account, sign in now to post with your account. Paste as plain text instead. Only 75 emoji are allowed.

bike wont start after full rebuild

Display as a link instead. Clear editor. Upload or insert images from URL. Bike Related Discussion Search In. Recommended Posts. Report post. Posted December 14, Share this post Link to post Share on other sites. Do you have compression? Could be as easy as a loose spark plug. If compression is low don't try and kick it anymore.What's new Latest activity.

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Customer Rebuilt Engine \u0026 Now It Won't Start

PW50 start switch Latest: chopperchriss Oct 4, Yamaha Mini. Latest: Rich Rohrich Oct 3, Kawasaki 2-Strokes. Vintage Motorcycle Rebuilds. Suzuki 2-Strokes. RM 80 oil capacity Latest: Mully Sep 28, New Member? Go here first. Why does my front brake drag? Latest: Mully Sep 24, Dirt Bike Brands - Other. Crfr vs r Latest: Rich Rohrich Sep 18, Rm died while riding havnt been able to start since?

Sticky tree sap or something on my helmet Latest: brithgob Sep 16, Husqvarna 2-Strokes. Bike won't start after rebuild. Thread starter cbr rob Start date May 22, May 22, Joined Jun 9, Messages 25 Likes 0. OK, I need some help here guys. Just finished the bottom and top end rebuild on my 87 CR The bike ran great before the tear down main seals and bearing were shotbut this thing won't even THINK about starting now.

It used to be a kick deal, even when cold.We are a community dedicated to the owners of Honda off-road dirt bikes and specifically the Honda CRF models. We are dedicated to increasing and sharing information, expertise and product knowledge to increase the enjoyment of riding and owning Honda off-road dirt bikes.

All Rights Reserved. Bike won't start after rebuild surprise, surprise. Bike has fresh gas, new spark plug, air filter, carb's cleaned out. No matter how long and hard I kick the motor over it gives me absolutely nothing, it doesn't even attempt to start. I get the occasional POP backfire but that's it. What the heck could I be missing?

If it doesn't I would go back to your timing. I have seen it happen a few times when people only match the timing marks on the cam sprocket to tdc-have you checked the timing using the marks on the right side inspection cover and the cam sprocket mark? When both of those are in line the cam lobes should be facing backwards, and the exhaust rocker arm should have wiggle room. Also there are 4 wires under the tank, by the carb, two of them are close in color, and easy to mix up if you don't look closely and could also cause timing issues.

I lined up the marks on both the left and right side inspection covers and then the cam sprocket, I also verified TDC the trusty old drift punch down the spark plug hole method. The intake lobes face rearward and slightly upward. I have had the carb off and opened the throttle, the accelerator pump shoots a healthy squirt of fuel, and the spark plug comes out a little wet after trying to start the bike. I've also gone through the carb 3 or 4 times with compressed air and carb cleaner, held all jets up to the light and could see clear through all orifices.

I tried a brand new plug as well as the last known good plug from pre-rebuild. I'm at a total loss, everything is there for it to fire Fuel, spark, timing, compression, air Losing my mind, haha. Fuel Air Spark Timing If you have these, the bike will run. I know you think you have everything nailed, but you are missing something. Do you have anyone with some knowledge to help? Occasionally, in your effort to do things, you continue to make the same mistake. Sometimes it takes some fresh eyes to find it.

I would do a leakdown test to make sure you aren't leaking compression at TDC. I just feel like I've been through everything enough times I should have it figured out by now. Question about the idle screw: I had the carb stripped down and removed the idle screw. How do you set it roughly without the engine running while trying to get it fired up?Please Log in or Create an account to join the conversation.

It looks like it can only go on one way, with the wire being at 7 o'clock and the hole in the case matching it. I'll have to take another look at it I guess. Ditch the 2nd cable? Welcome, Guest. Username: Password: Remember me. Forgot your password? Forgot your username? Create an account. Bike won't start after rebuild. Bike won't start after rebuild 14 Jul Hi all, I just finished rebuilding my '79 KZ, new rings, used head assembly, and gaskets but now I can't get it to start.

The engine timing seems to be degrees out of rotation, and I'm getting a backblow through the carbs backfire, but no explosion. I followed the Clymer manual closely while doing the rebuild. I made sure that the 1 and 4 cylinders were at TCD, installed the cams making sure the "T" marks were pointing to the top surfaces of the cylinder head, and counted the chain pins per the manual.

At this point i'm just looking for some advice on what I can do to get it running. Any suggestions? It might be, I took it off prior to the rebuild. I thought that after I reinstalled it the bike would run bad until I adjusted the ignition. How would I go about finding that out? Flip it I personally detest clymer manuals, get a real one, it's worth it:.

I think you can get it out if the coil wires to the points are reversed or if the cam on the crankshaft is reversed.

I believe one set of points fires the and the other fires the cylinders? Last edit: by bountyhunter. Make sure your valves are adjusted if you haven't already. Some 25 years ago after I had my KZ head rebuilt, the damn thing refused to start. Dad said, "Did you adjust the valves?Forums New posts Search forums. Members Current visitors New profile posts Search profile posts.

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Log in. For a better experience, please enable JavaScript in your browser before proceeding. Thread starter Beachum Start date Nov 16, Installed new cylinder, piston and rings. New fuel lines and carb. Valves adjusted correctly and installation sequence followed by clymer manual for third time now. Wont start, it was trying to advanced and kicking back. Now only backfres once in a while.

Bike won't start after rebuild

I've noticed on the compression stroke at TDC when the spark should spark the pulse rotor is degrees away from the pulse generator. This is why I have been back into the top to see if I messed up the sequence of installation but it all checks out as far as I can see if that is a problem maybe thats normal the marks between rotor and generator not lining up at time of spark Valve timing is correct once the chain adjuster has tension?

Sounds like it's a tooth off. Just got done, advanced a tooth and then retarded a tooth. Nothing seemed to change. Pretty sure I had it right, tried a tooth in each direction in case thoI've watched Clemson a lot. They're fun to watch. They didn't want us to be here so let's tell them why we're here. I know I'd have a little edge about me if they didn't want me to be in there.

Then we get in there and we're playing Clemson, the team we lost to in the final minutes last year. I'd have a little edge about. I at least think they'll beat Clemson. I think coach (Dabo) Swinney has done a great job with the culture there to do what he's done in a relatively short period of time just winning ballgames and staying on top.

Clemson is looking good as well.

bike wont start after full rebuild

College football is crazy, man. Anybody can be beat on any given day so you have to hold onto your seat and watch what happens. I have my guy, Dexter Lawrence at Clemson. We played high school ball together so I have to go with Clemson. I watched them play all the time, Georgia, I've seen them play all the time. There are a lot of good teams in there right now. I'm a Georgia Dawg.

bike with new top end won't start

I see them on TV and see what kind of players they have. I think whoever wins that game will go on. They have the experience of being in the playoff so I think that would be my guess.

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