Need Help--Broken valve -
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post #1 of 9 (permalink) Old 07-13-2009, 01:12 PM Thread Starter
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Need Help--Broken valve

Hi Everyone,

Newbie 2000 F4 750S owner here. I broke down on the freeway cruising about 70-75mph when something in the engine "popped" followed by a rattling noise. After getting it towed and having a mechanic look at it, we found a broken valve in cylinder 1.

I would appreciate any advice and suggestions on what's the best way to proceed. Repairing my existing engine seems to be a costly and time consuming affair. Anybody (CAG?) have access to used engines? It seems possible to install the 1000 engine if available, although Cooper3309 had some issues with the 1000R. I found someone selling a salvage title 2005 1000S. Can I just swap the engine, computer, and wiring harness (at the minimum) to make things work?

I appreciate everyone's input and help to get a fellow member get up and runnning again.
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post #2 of 9 (permalink) Old 07-13-2009, 01:24 PM
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Can you provide some maintenance history on the engine, how the bike was used, etc. Any other damage found other than just the valve? If its a bent / broken valve, you may have cam & piston damage as well. I've had to replace a valve in one of my engines before and the cost was cheaper than replacing the motor, granted nothing else was damaged.
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post #3 of 9 (permalink) Old 07-13-2009, 01:42 PM Thread Starter
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I actually bought the bike from a fellow member. All the records are in place up the 7500mi service. I was just over 10900 when the valve went. My mechanic also noticed cylinders 3 and 4 were crusted with deposits and oil (the other cylinders were clean). We stopped at this point after determining the "main" problem. I figured I should get 2nd opinions and experienced advice at this point.
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post #4 of 9 (permalink) Old 07-13-2009, 03:23 PM
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I have valves and 750 engine parts if that's what you need.

Send me a pm about a 1000 engine.
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post #5 of 9 (permalink) Old 07-13-2009, 05:02 PM
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What all kind of parts are you needing, if CAG doesnt have it i might have something
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post #6 of 9 (permalink) Old 07-16-2009, 10:30 AM
Join Date: Apr 2009
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I have the complet engine of 750s 2001 for parts on sale and I instal on me F4 the 1000r 2007 widouth the electric wire and computer. I use the 750 ECU and wires and it is working bath is very hard too chipet in low rpm. I liket very matck beacose I live in Romania and whee like too fuc.. the police.
If you need someting from me 750 parts or any help pleace contact me at [email protected]
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post #7 of 9 (permalink) Old 07-16-2009, 10:46 AM
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The 1000 will bolt right in. If you want details on a engine swap, PM me

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Take off your pants and jacket

01 750S W/1000R engine
01 Ducati 748 W/853 kit
03 Yamaha R1 (SOLD)
01 Kawasaki KX 125
88 Yamaha YSR 50
01 Yamaha R6
03 Suzuki DRZ pitbike
1982 Honda 110 atc
Yamaha PW50
1978 Honda 90 atc
2011 Yamaha Grizzly 700
2008 Yamaha Raptor 660
1975 Kawasaki G5 100
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post #8 of 9 (permalink) Old 07-16-2009, 11:16 AM
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Have you thought of trying to contact MV directly? This problem just seems so rare to be happening on a bike with such low miles. I contacted them about an Exhaust Camshaft problem and they just replaced it. Just a thought.
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post #9 of 9 (permalink) Old 07-17-2009, 08:44 AM
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Try this 750F4 motor for sale on fleabay...
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