Text only | Text with Images

Motorcycle Racing Forum

Motorcycle Racing => Wrenching => Topic started by: Huey130 on May 05, 2004, 10:56:50 AM

Title: How're yall's newer (> 02) SV's holding out?
Post by: Huey130 on May 05, 2004, 10:56:50 AM
I know of several stock, mildy built and built 03+ SVs going pop on the WERA side. Hell even Suzuki's Morgan Broadhead's blew up on him.

Here's mine: JE 2 mil over pistons (I know several 2 mil overs that made it through entire years w/o damage like this), stockj connecting rods and crank, used the JE head gasket with no decking, degreed cams (set to stock numbers) and remapped fuel injection:
(https://www.ccsforum.com/proxy.php?request=http%3A%2F%2Fwww.bbcracing.com%2Fold%2Fpics%2F03grenade%2Frear_piston1.JPG&hash=6049b90243d0b85a3c27036b06d975d165b2194b)

http://www.bbcracing.com/old/pics/03grenade/

First guess is a pure small end failure from the stress of the forged piston and / or the higher compression (13 to 1).

So, What are y'all seeing with them?




Title: Re: How're yall's newer (> 02) SV's holding out?
Post by: Dawn on May 05, 2004, 11:28:45 AM
Ooooo..... Owch!  We still have the 01 SV, but I'll keep my eye open.

Dawn   :)
Title: Re: How're yall's newer (> 02) SV's holding out?
Post by: tzracer on May 05, 2004, 12:07:28 PM
Ouch, I think it is going to cost more than $20 to fix.

My 03 has survived one race weekend so far with no problems.
Title: Re: How're yall's newer (> 02) SV's holding out?
Post by: Dawn on May 05, 2004, 01:32:41 PM
Brian:

Is your's stock or do you have an overbore like Huey there?

Dawn
Title: Re: How're yall's newer (> 02) SV's holding out?
Post by: tigerblade on May 05, 2004, 08:24:23 PM
Mine's completely stock internally and has made it through two weekends.  I don't want to take it apart for fear of what I might see.   :o
Title: Re: How're yall's newer (> 02) SV's holding out?
Post by: tzracer on May 06, 2004, 08:23:36 AM
My engine is stock, only a pipe and no changes to the fuel injection yet.

From the pics, it appears to be a rod failure. I haven't had a chance to see how wide spread the problem is. My bike will pull past red line, I wonder if those having problems are using tachometers to prevent over revving the engine.
Title: Re: How're yall's newer (> 02) SV's holding out?
Post by: watsonx11 on May 12, 2004, 07:05:32 PM
Sorry dude to hear about your motor, but I have to agree about the lower end being the culprit.  

That has pretty much made my mind up about not building my engine up.

Hope you are racing again soon. :-/

Title: Re: How're yall's newer (> 02) SV's holding out?
Post by: speedy619 on August 19, 2004, 04:32:27 PM
Huey,

you get an answer you like yet concerning the demise of your bike?  If you had a small end failure that is because the thing was oil starved for a moment or two.  Many possible causes.  What is the range of damage to the motor and what is the condition of the crank and bearings?

Mike
Title: Re: How're yall's newer (> 02) SV's holding out?
Post by: spyderchick on August 19, 2004, 07:14:21 PM
There are oiling problems with the SVs, especially the built ones. Consult you local SV (Ed Key) expert for possible fixes.
Title: Re: How're yall's newer (> 02) SV's holding out?
Post by: Bruce_S on October 21, 2004, 01:48:28 PM
The biggest problem, as stated is oil starvation.  It leads to broken cranks.  The only fix right now is a forged crank.  Conversly, our '02 has had no problems as we stayed below 90 hp, which seems to be the limit.

If you do want to build above 90, then be sure to purchase an after market rev-limiter and stay below 9500.  There's no significant increase in power beyond that anyway.  Just my opinion.
Text only | Text with Images