2008 Yamaha Yamaha G5 - Answered Questions & Fixed issues

Motorcycle Wiring Harness Kits

Have you checked the carb boots for cracks? the fuel screw under the block off plug? Remove the plug and set the fuel screw to 2 to 2.5 turns and hopefully you'll see a difference on starting,warming up and idling in the cold.

Did you accidentally cross the spark plug wires? Other wise its going to be hard to diagnose, Do you have plenty of compression, Are you getting gas to the spark plugs? Is the air filter clean/new? You will need a factory service manual to diagnose further if all the above is ok

Your bike may be jetted too lean. A common problem in these days of overzealous EPA regulations. You can tell if when you've cranked your throttle wide open and it splutters, if you back off on the throttle about 1/8 to 1/4 turn, it clears up. This is indicating that it is jetted too lean. When you close the throttle slightly, the fuel is being metered by the main jet and by backing off on the throttle a bit, you're cutting back on the air, thereby bringing the mixture closer to what the engine needs. Try rejetting the carb, Go up one or two sizes on the main jet, one step at the time.

Now, it could be too rich as well. If it splutters and blows black smoke out the exhaust, it either jetted too rich or the float level in the carb is set wrong.

Take care of the simple stuff first before rejetting the carb. Make sure your spark plugs are the correct ones and they are not fouled from overusage of the choke or enricher. If you allow the bike to "warm up" with the enricher on, plug fouling is common with this practice. I get the bike started and as soon as it will run without the enricher or choke on, I turn it off and keep the bike running with the throttle. Don't foul as many plugs that way.

has the carb been cleaned out and set up ?

say you have a small man inside your motor with a hammer banging away ???

try climbing in 2nd and 3 rd gear. remember lower the speed lower the gear

Have you check the choke position?
When you got it going does it rev up high immediately, if yes then you choke is stuck wide open.
Good enough?

Sorry but your question is listed as a computer problem? If you have a motorcycle question please ask it again with a proper heading! Thanks

It will be less than 500 ml per leg.
Fork oil is sold in 1l bottles

Drain each for leg in turn and measure qty coming out in jug.
Alternatively make sure front end is raised.
Take off the fork caps, take out the springs and use a dipstick to find how far down the oil is.
Empty each fork and refill to same mark.

you might try tradebits.com you may have to pay 5-6 dollars for it but it is an instant download and you will have it then.

Hi
Its best to stick with standard sizes as Yamaha put a lot of research into finding the best tyre sizes for each model

Ride Safe
Bike-Doc

Hi.

If the engine dies completely when you put in gear, check the kickstand switch. This can be tested jumping its contacts, the problem should disappear.

If instead the bike is running only with choke on, that is a carburetor problem. Check mixture regulation, eventually check fuel filter, air filter and fuel lines and clean the carburetor body.
This bike is known for having very lean settings from factory (carburetor mixing little fuel and more air). Read this article on the G5 carb problem.

make sure enough petrol is getting to your carb, check the fuel line going from your tank to the carb make sure it is completely free nothing bloacking it t all, nd if that does not work buy some carb cleaner :)

sounds like a wiring problem to me.

Is there oil in the gearbox? Is it really dirty? Lack of oil and dirty oil could account for the clutch problem. If you have put synthetic lubricant in the gearbox that could also account for the clutch. Synthetics can swell the cork on the clutch plates. New fiber plates would be needed.

The shifting problem could be tied to the lack of oil or dirty oil but usually the problem is bent shift forks. If fresh oil doesn't fix the clutch the clutch will need to be inspected/repaired. If that doesn't also fix the shifting, ( and I don't think it will ), the engine will need to be torn down and the shift mechanism inspected. Forks will likely need to be replaced.

Check magneto plate

Remove the allen plugs and turn the holes downward (6 o'clock position) to drain the old oil. Fill with Polaris Direct Drive Hub fluid and turn the hole to the 8 or 4 o'clock position to remove excess oil.

Needle fallen into the needle jet? Blocked exhaust?
Please get back to me if you require further asssistance.

Simple thing you have to check...your carb , and your plug.This prob normally come when your bike is seldomly used. gas perished in a month and affect the condition of our bike.try to fill a gallon of petrol. to check if the cause is from the perished petrol.