Question about 2006 Yamaha YZF-R1
My 2009 Yamaha R1 that I recently purchased has a severe shudder at low speeds (15 mph) and lower in 1st gear which makes it hard to cruise through the neighborhood and when starting out. I have been told that they are geared extremely high but this does not seem normal. Any suggestions on what the issue might be?
Hi, Tom and the usual suspects are:
1. Severely discharged or a damaged battery, should have 12.5 volts or better and be able to pass a load test if necessary.
2. Check battery terminals for damage or corrosion, check the battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary.
3. Spark plugs in bad condition or partially fouled.
4. Spark plug cables in bad condition and leaking check for spark leakage in the dark.
5. Spark plug gap too close or too wide.
6. Faulty ignition coil, module, and or sensor.
7. Loose, dirty, or corroded ignition module connector at crankcase.
8. Faulty CKP sensor.
9. Intake air leak.
10. Water, dirt, or rust in the fuel system, carburetor and/or filter.
11. Fuel tank vent system plugged or carburetor vent line closed off.
12. Vacuum line from intake manifold to fuel valve is broken, cracked, pinched, or missing.
13. Carburetor controls misadjusted.
14. Damaged carburetor.
15. Incorrect valve timing.
16. Weak or broken valve springs.
17. Damaged intake or exhaust valve.
18. Check for engine trouble codes
For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have nice a day.
What may be the reason for vibration in bike at particular speed
OEM parts for Yamaha
Posted on Sep 02, 2016
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Posted on Jan 02, 2017
SOURCE: Grabby clutch in 1st.
I'll bet you replaced the "fiber" plates only in which case you need to either take the steel plated out and have them sand blasted, or preferably "glass beaded", you have a hot spot on one of the plates which is causing the clutch to be "grabby" also not sure if you replaced the clutch springs but if you did and they are after market they may be to high of spring pressure.
Did you install a stock clutch or a after market one? Many times the after market hi-performance clutches are made with aluminum plates and then they add the fiber and the clutch will chatter because the engine HP to to substantial for the aluminum to handle. I highly recommend using the stock Yamaha clutch plates and springs. They are of the highest quality and are the best to use.
Please let me know what type of plates you are running and I'll work from there with you. Also if you cannot get the plates blasted you can take them out and rough them up on your garage floor. Your want to use even pressure and move in a circular motion to scratch them up. Make sure you clean them afterward in mineral spirits. You can buy that at any paint store real cheap.
Posted on Dec 12, 2008
This happens when the parts of gear box is not proper due to misalignment. hence service the gear box first.... also change the oil and all the ball bearings of the gear box ... lubricate every parts in gear box.
Posted on Mar 05, 2009
Posted on Mar 17, 2009
Does the bike have a sidestand switch that cuts the power if the stand is left down? If it does, disconnect it and temporarily join the ends together and try starting....
Posted on Mar 21, 2009
The sound is being caused by something mechanical. It is not likely to go away by it's self. It will probably get worse. Don't wait for the next service. Take it in now before any more potential damage can be done. Check the oil level in the gearbox. It could be low.
Posted on Jan 21, 2010
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