My 954's block cracked on the dyno today! - Honda Motorcycles - FireBlades.org
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post #1 of 21 Old 11-03-2006, 9:49 PM Thread Starter
 
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My 954's block cracked on the dyno today!

I took the bike to get custom tuned today after putting on the full Hindle. The good news was that it went from a baseline of 137 hp to 145 hp and 72 ft-lbs after the tuning with a nice 13.2 AFR and pretty flat hp and torque curves. During the last pulls, though, the bike started leaking some coolant although temps had been in the low 200s. We noticed that the leak was coming from the front left of the block a few cms below the head, along what appeared to be a casting line. It seems that the block outside of one of the water jackets cracked across the front of the block. The bike was allowed to cool down between each set of a few passes.

Has anyone heard of such a thing? This seems like really bad luck. I'm thinking that this area may be able to be welded. Tho other options are going with a used motor or getting a new Honda case, but that's probably not worth the cost of parts and labor.

Any thoughts would be appreciated. I was so close to that 9 second quarter mile until this happened. Did I mention that this really sucks ass?

Take care,
Franc
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post #2 of 21 Old 11-03-2006, 9:55 PM
 
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Re: My 954's block cracked on the dyno today!

Whenever I work on the dyno, I shut everything down at around 190 or so. If you are mapping for 13.2 and the bike was running in the 200s you probably stress cracked the thin cylinder casting. Why were you tuning for 13.2? That works fine on a Saturn or your Blazer, but usually is too lean to make much power on the 929/954s especially for a race setup.
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post #3 of 21 Old 11-03-2006, 9:58 PM
 
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Re: My 954's block cracked on the dyno today!

That sucks! I hope everything works out for you.
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post #4 of 21 Old 11-03-2006, 10:04 PM Thread Starter
 
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Re: My 954's block cracked on the dyno today!

The tuner felt that 13.2 was a reasonable target for my bike being 95% street/5% dragstrip as far as use goes. It may have been too lean for the dyno runs, I'm not sure.

Regardless, it really does suck.

Take care,
Franc
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post #5 of 21 Old 11-03-2006, 10:11 PM
 
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Re: My 954's block cracked on the dyno today!

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Originally Posted by franc01 View Post
The tuner felt that 13.2 was a reasonable target for my bike being 95% street/5% dragstrip as far as use goes. It may have been too lean for the dyno runs, I'm not sure.

Regardless, it really does suck.

Take care,
Franc
Sorry, didn't realize that you were running a 9 second bike on the street .

I still think it was running too hot for back to back dyno runs. I'm assuming he had a big assed fan running during all the runs?

You're right, it does suck, but depending on the actual placement of the crack, it may be weldable.

I also read about a problem with the Euro 954s cracking in roughly the same place so you may want to do some searching and see if it applies to your case. If so, you may be able to get some help from Honda as long as it is a noted problem . . .
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post #6 of 21 Old 11-04-2006, 12:15 AM
 
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Re: My 954's block cracked on the dyno today!

Wow sorry to hear about that. Hope you can get her fixed.
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post #7 of 21 Old 11-04-2006, 11:39 AM
 
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Re: My 954's block cracked on the dyno today!

It's common problem with 954 2003 models. Honda has replaced engines when it has happened. Contact honda. I know personally guy who had engine changed free when it cracked. honda used some cheap contractor and some of the castings are flawed.
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post #8 of 21 Old 11-04-2006, 12:11 PM
 
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Re: My 954's block cracked on the dyno today!

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Originally Posted by JakeT View Post
It's common problem with 954 2003 models. Honda has replaced engines when it has happened. Contact honda. I know personally guy who had engine changed free when it cracked. honda used some cheap contractor and some of the castings are flawed.
There you go
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post #9 of 21 Old 11-04-2006, 12:48 PM
 
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Re: My 954's block cracked on the dyno today!

https://www.fireblades.org/forums/hon...t=coolant+leak

take a look at this, some pics of the european problem. good luck...
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post #10 of 21 Old 11-04-2006, 1:08 PM
 
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Re: My 954's block cracked on the dyno today!

I did the exact same thing before a semi-truck ran into me....did they have problems in the 02 version? I did it and was perfectly fine on the dragstrip...just curious...btw, gl, on it, i hope she turns out fine.
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post #11 of 21 Old 11-04-2006, 9:56 PM Thread Starter
 
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Re: My 954's block cracked on the dyno today!

Those pics of the front of the case show exactly where mine is leaking and the horizontal crack looks similar!

I will call Honda Monday to see if there is anything they will do about it. It really does suck, I absolutely LOVE my 954!

I'm just glad it started leaking on the dyno and not while I was riding it down the strip. My trap speeds were 133 to 135 before this current tuning and it would suck to have a slipping rear tire at that speed.

I'll keep you guys posted.

-Franc
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post #12 of 21 Old 11-04-2006, 10:47 PM
 
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Re: My 954's block cracked on the dyno today!

Please do update on this one.
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post #13 of 21 Old 11-06-2006, 3:32 PM Thread Starter
 
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Re: My 954's block cracked on the dyno today!

So I called American Honda today. I am going to take it to a dealer here in NYC to have it looked at in order for them to try and figure out if any "cost assistance" can be offered. The woman I spoke with said that there was no indication that there had ever been a problem with the 954 casings either here or in Europe.

So the dance begins...

-Franc
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post #14 of 21 Old 11-06-2006, 3:40 PM
 
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Re: My 954's block cracked on the dyno today!

Who did your tuning?
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post #15 of 21 Old 11-06-2006, 6:31 PM
 
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Re: My 954's block cracked on the dyno today!

Great, now that'll give me something else to sit in the back of my mind and worry about. Know of any vins or build dates that these are affected?
Good luck anyhow. If the shop guy 'thought' that was the correct ratio then it blew, there should be some kind of responsibility right? I dont know, never been to dyno shop.
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