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  • September 21, 2018, 06:47:38 PM
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 21 
 on: September 19, 2018, 07:22:17 PM 
Started by Stag - Last post by Stag
Bit of backstory.

The bike started off as a gt125r, Engine sized. Replaced the 125cc engine with the 250cc engine, Did a thousand or so miles on it. Valve went through the position. Moved from the UK to France for 7 months. The bike was dry stored in my garage for 9 or so months. Bought a 125cc engine for the bike so I could just wack it in and sell it. Saw vids of the engine running. Arrived to collect the engine and I realized they had made a right mess of removing the old exhaust manifold.

 

When it should look like this



As I already had 4 other heads, I swapped out the head and redid the timing in the process, I'm confident it's correct.

I reinstalled the new engine into the bike, But as I had not planned on ever buying a new engine for the bike and reinstalling it I did not have any pictures to go off for which pipe goes to what If that makes sense. From what I could find on the internet I think I have the set up correct, But when I try to start the bike she turns over but won't fire. Both of the spark plugs are sparking, There is back pressure as both exhausts manifolds are sealed. She is compressing. Not quite sure why she won't start. Does anyone have any ideas?

Below are images of how I have the bike setup








 22 
 on: September 19, 2018, 07:15:54 PM 
Started by savisaar2 - Last post by Sid
Faulty kickstand switch?

 23 
 on: September 19, 2018, 02:53:45 PM 
Started by Maritime - Last post by Maritime
Oh and I just realized I didn't turn on notifications on my profile so I wasn't getting emails when folks replied.  thanks for the welcome.

 24 
 on: September 19, 2018, 02:50:31 PM 
Started by Maritime - Last post by Maritime
Thanks guys, just an update: received the new fan and shroud so was able to let it warm up to proper temp. it's hard to get going from cold but once warm it starts with one push of the starter or one kick. I have it idling at 1200 RPM and will rev to 8K sitting on the stand. I have ridden it around the yard so far but had to replace the headlight and the RR on it, the speedo doesn't work, sorted it down to the hub drive so I need to look at that, the old drill on the cable made the needle climb.  all in all it's almost ready to be road legal again. Thanks for the links, I find the manual barely any good but does have some info I needed.  So what I did so far:
New front pads
New headlight
New RR
Cleaned carb and whole bunch of other bits and pieces
new battery
New main fuse to blade style (this was bad, fuse was ok but wires were shorted)
new fan and shroud

 25 
 on: September 19, 2018, 02:41:16 PM 
Started by Maritime - Last post by Maritime
Nothing now that I got the carb cleaned, fan replaced, new front brakes, RR. right now I think the electric choke is stuck closed as it has a hard time cold starting but once warm it idles, revs and rides fine. I have a few things to button up before I register it and insure it for the road but so far elbow grease and a few parts and it's pretty much GTG.

Cheers

 26 
 on: September 19, 2018, 07:22:39 AM 
Started by jojobutter - Last post by umop-ǝpisdn
Is this it?

https://www.hyosungwholesale.com/products/hyosung-valve-assy-gt125-gt125r-gt250-gt250r

 27 
 on: September 19, 2018, 07:10:03 AM 
Started by jojobutter - Last post by bobe7316
Did you find out if the part was the Secondary Air Valve Solenoid or something else.

Bob

 28 
 on: September 19, 2018, 07:06:54 AM 
Started by MotoFairfield - Last post by Lost Paradise
willing to buy everything if still available
Thanks, Lost

 29 
 on: September 18, 2018, 06:05:51 PM 
Started by savisaar2 - Last post by Cloud

Yeah, it's rare to see a bike where it's all still working.

It can be fixed if you're patient and don't mind re-wiring.

 30 
 on: September 18, 2018, 03:28:14 PM 
Started by savisaar2 - Last post by savisaar2
Can the kickstand wiring or whatever get dodgy overtime? It's just annoying when kick stand is up and in neutral it won't start sometimes. Also kickstand when I am in neutral and kick stand is put down neutral light goes off?

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