LaserBeam

Burned toast, smokey bacon flavoured plugs. I had that black stuff all through my motor and all out the exhausts & the muffler. I had gunked up, failing carbs & oil getting passed rings & buring a black slduge through the bike a just bought … “Nothing to spend” he said … “It’s only done 2,700kms”, he said. I’m still cleaning up all his…

Yeah. No worries. Any time. Happy to help.

Did you put new rings on old pistons, then pop them back in to old cylinders?

What did your cylinder walls look like? Do they have deep, vertical scratches?

Did the old pistons have scratches that match the scratches on the cyclinder walls?

Rings are important & relatively easy to swap. Honing the Cylinder walls is pretty darn important to but…[Read more]

This will help you:

View the GV125 Parts:  GV125 Parts Catalogue

Downloaded this Parts Catalogue here: https://hyosungsource.com/catalogs/hyosung/GV125PARTSCATALOGUE.pdf

[/quote]Some great images, Jim. It’s a very tidy bike … makes me want to get a new one.

🙂

Endoscope Cams are really handy. Some are cheaper than chips. I used my cheap USB endoscope for this job. Plugs into a phone; uses an APP or slots into your laptop with software. The camera is about 4-5mm wide & perched on bendable-wire. LED lights, around the camera, which you can turn up, down & off.

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It is, hey? I was suprised. You can get individual shims of 7.48mm. Write down the SHIM for each VALVE in your bike. The SIZE of the SHIM is written on the top. There’s an A, B, C & D stamped inside the head assembly so i write down Front A-170 B-175, etc. Then i bought shims that were slightly bigger & was going to put them in but it won’t be…[Read more]

I’ve got an Endoscope Camera to see if the timing-chain is on the teeth correctly too. Small ones are very cheap & plug into phone or laptop’s USB Ports. They have a bendy wire so you can get it in behind the flywheel, etc. If there’s a kink, send the magnet tool in again. It’s agood fast fix – saved me searching for a  Suzuki puller (?) for…[Read more]

That’d be best but i  replaced the loose Cam timing-chain with a bit of magic instead.

😎 From the FRONT of the ENGINE, i slid a Telescopic Magnet Tool  beneath the UNDERSIDE of the TOP part of the Timing-Chain then pushed it in & lifted it up. I also got some slack on the LOWER part of the timing-chain by pushing that in a bit with a 2nd M…[Read more]

Thank you, Marcel. The F and R do represent Top Dead Centre of the compression phase.

20ft lbs is about 27Newton Metres? My wrench is only Metric.

I put 2 new pistons & rings on & today i put the cylinders on those. Cam-chain of the FRONT cyclinder has fallen off & turns freely.

How do i get the Cam Timing Chain back on?

Can i do it without…[Read more]

6mm Fuel Lines & 5mm Vacuum Hoses on my Hyosung GT250R.

Your 650 hoses will be bigger than this. It matters not.

The big hoses are for fuel & the smaller ones are vacuum.

I think the ORANGE BOX in your top photo is for VACUUM HOSE & connects to your Pump.

G’day Hannah pool. Under Tank connections:

PINK is a 6mm Fuel Line on my GT250R. Fuel runs OUT from the tanks petcock there & connects to the FUEL-FILTER & then connects to the VACCUM PUMP.

Note: Vacuum PUMP has an ARROW-IN, an ARROW-OUT & a LETTER P stamped on the front of the pump . The arrows are located where the fuel lines connect to…[Read more]

Hi Pj, if the 2017 bike is running, & looks pretty good, i would buy that. The bearings all over it are going to be 11 years newer as will the rest of it

Is the 2017 bike running; does it start & can it be ridden normally? If the guy wants to trade your 125 for his 250 i wonder if his bike has worn piston rings like my 2008 GT250R?

Check the…[Read more]

G’day Jonathon, your bike looks in good shape. Marcel & these have the knowledge to get that up and running. Your step by step problem solving is the go. If cash is no problem i’d buy an ECU but it may just be broke/shorted/disconnect wiring. I wonder why your headlight has no power to it at the fuze? That seems a bit odd hey? Those lights need…[Read more]

Handy little gadget & will save cash. Thank you mate. I’m stoked your bike is going. Serviced my carburetors & up-jetted them. The jets, floats & float seats were all gross. Bike runs so good, has a working choke, there’s no fuel spraying into the airbox anymore & it sounds so beastie with 95 & 97.5 Main Jets.

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Good job bro. It looks like the bottom of the spring was also hitting the swingarm. It looks a bit grazed & rusted. Good thing you found that issue – would’ve made for a horrible ride & pretty unsafe. I been looking at mine just to be sure i’m ok. 😀

My Rear Brake Master Cyclinder did SIEZE. It was full of rusty brake fluid. I couldn’t save it even after a cleaning. Fitted a cheap replacement and it actually works alright. Cost me only $6 Pounds. I know- what a bargain. Has a cheesey little reservoir & hoses but it’s working. I been riding in a thunderstorm just because the bike CAN be ridden…[Read more]