Question about Yamaha YZ 450 F Motorcycles

1 Answer

I have a 2001 banshee. took my cylinders to yamaha and there bored them out and did the rings i installed everything. has compression spark n air. fuels getting to the carbs but it still wont start. called yamaha and asked if it needed to be jetted and they said no. any ideas?

Posted by on


1 Answer

  • Level 1:

    An expert who has achieved level 1.


    An expert who has answered 20 questions.


    An expert that hasĀ over 10 points.


    An expert whose answer gotĀ voted for 2 times.

  • Contributor
  • 33 Answers

Is the timing set properly? you might have an issue unrelated to the cylinder work....can you give me more information....what have you checked, and the exact symptoms....when you took the carb off, did you mess with the TPS ?

Posted on Apr 11, 2011


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

1992 banshee starts up and dies and low compression how to tell if rings are bad

Pull the plugs and run a compression test . record readings . now squirt some oil into the spark plug holes and redo the compression test . record readings . if the compression was higer on the second test , the rings are bad , if not the valves are bad

Feb 24, 2014 | Yamaha Motorcycles

1 Answer

Yamaha dt125 won't start

Many piston compression (rather than oil) rings are uni-directional, and need to be installed with the proper side upward. The rings will have a "T" or "TOP" etched on the surface that needs to face upwards.
So my first question is, did you install the rings upside down?

Second, why did you replace the rings?
Did you measure the cylinder bore? Was it oversized, or out of round?
Is the bore worn enough that the piston is now too loose a fit?
Did you get the correct size rings? If you bored the cylinder, did you get the proper oversize rings?

Nov 20, 2013 | Yamaha Motorcycles

2 Answers

Why is my Yamaha Banshee is hard to start

It looks like your compression is too low (worn rings from dusted motor) Push starting spins the motor faster than kick starting and when hot the rings expand just enough to seal off. Before kicking a cold motor try putting in a squirt or two of engine oil in the plug hole to see if there is a difference.

Apr 26, 2013 | New Ray Ray 1/12 Yamaha YF 350Z Banshee 06

3 Answers

2003pontiac grand prix how compress the piston by compressing or by turn in ?

What you need to do is lift the car take out the wheel where crank shaft is,
also know as the harmonic balancer

Jan 20, 2013 | 2003 Pontiac Grand Prix

1 Answer

My banshee pushes coolant out of the overflow

Typically, with this type of problem , you are dealing with a leaking head gasket. Compressed gas and air from the compression stroke is forcing gas past the head o-ring or gasket into the coolant side of the cylinder. The expanding air bubble forces coolant past the cap causing the bottle to over flow.

Aug 16, 2010 | 2002 Yamaha TT-R 250

1 Answer

Yamaha banshee will not start

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

Jun 19, 2010 | 2008 Yamaha Yamaha G5

2 Answers

How much compresion should a 01 banshee have on each cylinder

The bike will still run even at 7:1 or a little lower, but the specifications call for about 10:1.

Feb 12, 2009 | 1986 Yamaha RD 350

Not finding what you are looking for?
Motorcycles Logo

Related Topics:

163 people viewed this question

Ask a Question

Usually answered in minutes!

Top Yamaha Experts


Level 2 Expert

314 Answers


Level 3 Expert

1216 Answers

Steve Sweetleaf
Steve Sweetleaf

Level 3 Expert

1165 Answers

Are you a Yamaha Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides