Question about 1985 Yamaha FJ 1100

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Setting the valves on a XJ1200

I have a XJ1200cc yamaha engine in a Legend racecar. I was told that the valves must be reset after racing it the firt couple times. I have three races on the new engine and I need to know how to set the valve lash before I race again. Any help & instruction you can provide will be greatlly appriciated. Thanks, 37legend coupe

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You will need a variety of shims, and the valve bucket holder tool to adjust the valves, but i find it hard to believe that you would need anything at this point. Just pop off the valve cover and check the clearances with your feeler gauge. I'd bet they are fine, unless theres a valve seat issue-

Posted on May 25, 2010


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95 acura legend, if I install a air separator tank thru the bleeder valve to relieve the trap air ,will it affect the thermostat operation?

Let me guess. Some mechanic told you to do this to your Legend? :-)
Do not do this (if it's even possible)

The simplest thing you need to do for the Acura Legend is to bleed the coolant system to get rid of the trapped air.

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Reset timing on 1995 250 Yamaha 4wheeler

Hi, Dessie sorry you can't find the first and best tool you ever bought for your Yamaha despair not for a mere $0 you can download another one. For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
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Legend race car 1250 yamaha. Put new carbs on it.Acts like it is starving for fuel. Will run with choke partly on.But still spitting back and popping through carbs.

lean misfire... you need to make sure the float bowls are filling up with fuel. I suspect a fuel flow problem... might need a low pressure low volume electric pump

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Are there any alternative scan tools to the DBR that do the same thing??

can be done with a laptop that has the cpu program in it for the ecm of the car
the program is costly well over $1 k but it allows you to reset parameters for the sensors ( just like the computer programs that can reset the parameters for racing engine while they are racing around the track)
most scanners with the correct protocol for the dodge system will read the fault codes and then reset the ECM

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Yamaha aerox 50 had new cylinder and pistons and now wont start

Hi, Woodwardjame and the usual suspects are:
1. Fuel tank empty.
2. The fuel tank has old dead gas.
3. Fuel tank bottom contaminated with ethanol sludge, dirt, water, rust, etc.
4. Fuel supply valve/petcock turned off.
5. Fouled spark plugs.
6. Engine flooded as a result of overuse of the enrichner.
7. Vacuum hose to the fuel supply valve/petcock disconnected, broken, cracked, or pinched.
8. Fuel valve/petcock or filter clogged.
9. Fuel line to carburetor or throttle body pinched, kinked or blocked.
10. Carburetor float stuck.
11. Fuel injectors clogged.
12. A severely discharged or damaged battery, you need 12.5 volts or better and be able to pass a load test if necessary.
13. 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.
14. Loose or corroded wire connection at the coil or plug between ignition sensor and ECM module.
15. Spark plug cables in bad condition and shorting check for spark leakage in the dark, cable connections loose, or connected to the wrong cylinders.
16. Ignition timing incorrect due to a faulty ignition coil, ignition module or MAP, CMP, CKP, O2, TPS, ETP, IAC sensors.
17. Faulty neutral, clutch lever, or kickstand safety switch.
18. Faulty fuel pump or fuse or relay.
19. A stuck bent or burnt valve.
20. Tilt sensor needs a reset.
21. Security system not disarming alarm needs a reset.
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How do i set cam position and timing on an old yamaha xt 500

You didn't say WHY the cam / valve timing needs to be reset. For some reason I get the feeling someone told you that resetting was needed and so you are asking how. Obviously, you may have installed new pistons and that is why the resetting is needed. In either event, when the cam timing is set the valve timing is also set. Other than adjusting valve lash, setting the cam sets the valve timing. Below is a web site where you can do a free download of a factory service manual. The process is not hard but having a manual will be more help and faster help than I can give online.

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I want to significantly power up my 1996 Yamaha Royal Star 1300. I've been told that putting racing cams, dual valve springs, a performance kit should do the trick. I'm obviously not a builder. What...

Race cams do increase power, but reduce mileage and don't idle as well. Dual springs prevent float at high RPM, but it is not clear you want to rev that high as they do in racing. By performance kit, I assume the idea would be to cause ignition timing to be advanced more when accelerating. This will take advantage of the valve opening overlap from the race cams, but may require premium gasoline to prevent pre-ignition.
Technically I think you can do this without even removing the head. But it may be easier to remove it. And then it may be cheaper just to go with a larger bore or larger valves. If you don't have the tools for compressing the springs, then you will have to take it in anyway, in which case you can get their opinion. But it is within the capabilities of most home mechanics that understand how to replace a timing chain. You have to keep the crank and cam in correct synchronization. If you don't know what I mean, then don't try it without reading up on camshaft timing.

Jan 19, 2010 | 1996 Yamaha Royal Star XVZ 1300 A

1 Answer

95' Yamaha Virago 535 will start but will not stay running. Sounds like running on 2 cy. Fresh gas & carbs rebuilt. Was told the elect. fuel pump ''is going bad''. I can drive it down the street but if...

Did you try to increase the idling adjustment screw?
Check the spark plugs for its condition and thn reset the air-mixture screw.
Standard procedure for setting air-mixture screw...tight it all the way in, taking care to not over tighten or the tip of the screw may be damaged, thn turn outwards 2 & half to 3 turns, start your bike's engine ,run it to normal temp. and the reset the screw + - alittle either way and you should notice the difference in the idling and all.
Its better too, to also check the valve clearance !
Hope this helps!

Dec 14, 2009 | 1995 Yamaha XV 535 Virago DX

1 Answer

My engine races upon starting, as if my throttle sticks. What gives? It is an 03 YZ 250

probaby settels down after it warms up a bit :-) pull the carb off and check for a cracked reed valve clasic problem with the old boyseen dual layered valves.
if not check that the carb is well sealed in the neck going into the engine a little air leak will give the engine a runaway effect
ride safe Good Luck

Oct 09, 2009 | 2003 Yamaha YZ 250

1 Answer


Hey ljthomp6_30,
I would just reset the flash back to the manufacturers default setting, which is done by pressing the mode button and the on/off button simultaneously for about 2 seconds. Keep in mind this will also reset any custom settings you have. In case you have lost your manual I have included a link to a PDF download of it, and directions on how to reset your flash are on page 12. I hope this helps!

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May 29, 2008 | Cameras

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