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Forum: Troubleshooting 04-26-2016, 01:36 PM
Replies: 9
Views: 2,784
Posted By gzed
Hey 05gz250, Do you know the last time the...

Hey 05gz250,

Do you know the last time the valves were adjusted of checked? This is normally one of the first problem spots on this bike. When they are out of spec it can be hard to start the bike...
Forum: Troubleshooting 04-26-2016, 01:00 PM
Replies: 0
Views: 809
Posted By gzed
Rocker Arm Shape

Hi All,

After bringing the gz250 back to life, the top end noise was still bothering me, and after a week of sitting it is having trouble firing up again. So decided to take apart the top end and...
Forum: Troubleshooting 04-13-2016, 03:48 PM
Replies: 19
Views: 4,405
Posted By gzed
This, the exhaust valve on the left side was...

This, the exhaust valve on the left side was almost completely shut. After putting them all back in spec, it fired up with some starting fluid on the first shot.

Also the comment from smakaho76...
Forum: Troubleshooting 03-22-2016, 02:19 PM
Replies: 19
Views: 4,405
Posted By gzed
Put a bit of oil in the spark plug gap and no...

Put a bit of oil in the spark plug gap and no change in compression. I guess that is kinda good news, since it means the problem is likely valves or head gasket.

Will take another look at the...
Forum: Troubleshooting 03-18-2016, 03:57 PM
Replies: 19
Views: 4,405
Posted By gzed
I could see this being an issue if they were too...

I could see this being an issue if they were too loose, though I remember reading the valves tighten over time on the gz. I don't know for sure, but will take another look at them when I take off the...
Forum: Troubleshooting 03-17-2016, 12:34 PM
Replies: 19
Views: 4,405
Posted By gzed
thanks chandlerbingfl, did you run a compression...

thanks chandlerbingfl, did you run a compression test? If so, what PSI did you get? I have not tried to bump start it, but will give it a shot.

The bike had a low top speed but didn't worry much...
Forum: Troubleshooting 03-16-2016, 09:12 PM
Replies: 19
Views: 4,405
Posted By gzed
Compression it is :crazy: Spent the money...

Compression it is :crazy:

Spent the money for a compression tester and not getting past 60 psi.

Debating if it is worth it to open the top or sell.
Forum: Troubleshooting 03-16-2016, 02:59 PM
Replies: 19
Views: 4,405
Posted By gzed
I will change out the fuel and give it another...

I will change out the fuel and give it another shot.

Prior to the winter the gz250 was rather inconsistent on starting. I would almost always have to use some choke to fire it up, but considered...
Forum: Troubleshooting 03-15-2016, 08:07 PM
Replies: 19
Views: 4,405
Posted By gzed
After trying for about an hour, still no luck....

After trying for about an hour, still no luck. The starting fluid did help it make it sound like it is about to fire. I am starting to think bad gas? I used a stabilizer but it did sit for almost 5...
Forum: Troubleshooting 03-15-2016, 03:34 PM
Replies: 19
Views: 4,405
Posted By gzed
No Start - Compression?

Hi All,

My 2006 GZ250 was having some issues starting before I winterized it. This weekend I put a fully charged battery and everything sounds to be in order but the bike does not start, even...
Forum: Troubleshooting 10-15-2015, 06:12 PM
Replies: 6
Views: 1,794
Posted By gzed
Nothing crazy with the stethoscope, I just used...

Nothing crazy with the stethoscope, I just used it to try to locate where the sound was coming from. But normal tapping, no grinding or squealing.

Just worried about the sounds with my ears, as...
Forum: Troubleshooting 10-14-2015, 11:41 AM
Replies: 6
Views: 1,794
Posted By gzed
Thanks Water Warrior. The previous owner didn't...

Thanks Water Warrior. The previous owner didn't tune the bike, and mentioned he often used the choke to keep it idling, never touched the idle screw on the carb. :(

I got it for a deal, but the...
Forum: Troubleshooting 10-13-2015, 05:47 PM
Replies: 6
Views: 1,794
Posted By gzed
Valve Issue?

Hi All,

I have a 2006 gz250 with 4500 miles that has a metallic tapping noise. I used a mechanic's stethoscope and it seems to be coming from the exhaust valves. I adjusted the valves to spec but...
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