Broken crankcase, can I fix it myself?

37970 Views 216 Replies 7 Participants Last post by Kubi07, 2 mo ago

Kubi07

Discussion Starter · Nov 27, 2017 (Edited)

Broken crankcase, could I fix it myself?

Long story short, I blew my motor and now there’s a hole right where the balancer is supposed to be on the right crankcase. So, I would basically need to buy a new right side crankcase and transfer or replace everything to it and I wanna know if it's doable to do myself even though I don’t have much knowledge as to how I would do that. I have the service manual but want to know your guys’ opinion if it’s something that’s possible. Thank in advance.

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Kubi07

Discussion Starter · #181 · Apr 5, 2022

Would it be fine if I tap into the red wire from the PCV? I believe this is where the PCV gets it's power so it shouldn't be a problem?

M_Quick

· #182 · Apr 5, 2022

I’m unsure, I’d have to review the install instructions from dyno jets web site.

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Kubi07

Discussion Starter · #183 · Apr 10, 2022

All good, I'm sure I can figure it out

M_Quick

· #184 · Apr 13, 2022

Sorry been busy as heck, especially with Bristol dirt race coming up. I found this while searching for my old right axle.

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Kubi07

Discussion Starter · #185 · Apr 13, 2022

No worries, not in a rush anyway. Glad to hear, how much do you want for it anyway?

M_Quick

· #186 · Apr 13, 2022

Kubi07 said:
Would it be fine if I tap into the red wire from the PCV? I believe this is where the PCV gets it's power so it shouldn't be a problem?

Dyno jet says red wire needs to be connected to a switched power source, like tail light. I know others used the ignition wire. I can’t remember what I gave for this, I know they sale new for around $320, so I’d say $160 shipped.

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Kubi07

Discussion Starter · #187 · Apr 14, 2022

I'm good with 160$, it does come with everything right?

Kubi07

Discussion Starter · #188 · Apr 16, 2022

Finally tried to get it started for the first time today and it won't start, I'm getting fuel and spark. The only way I can get it to turn on temporarily is if I spray gas through the intake. I'm getting fuel through the injector, don't know if it's enough or not but it looks fine to me. Not sure if the aftermarket pump is the cause but like I said, fuel's spraying through the injector just fine.

Kubi07

Discussion Starter · #189 · Apr 23, 2022 (Edited)

2

Figured it out, it was the cheap fuel pump I bought, bought an OEM one and it started right up. But now, I ended up some how cracking the brand new cylinder... My guess is that it was running lean. Didn't even last an hour, any thoughts?

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M_Quick

· #190 · Apr 26, 2022

Holy smokes, that sucks man.

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Kubi07

Discussion Starter · #191 · Apr 27, 2022

It really does man. Don't think it's anything bottom end so it isn't too bad. Gonna fix it and try again, gonna not be cheap and buy the barker's exhaust instead of running the stock one. Still interested in getting that autotune off your hands if you're still willing to sell it.

How did the race go?

M_Quick

· #192 · Apr 28, 2022

Race was awesome, except K. Busch won.

Did you use starting fluid or anything to get it to fire up? As far as the autotune, just let me know, I'll hold it till your ready.

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Kubi07

Discussion Starter · #193 · Apr 28, 2022

If you mean after the cylinder was cracked, then no. Won't even crank anymore. Really hope there wasn't any damage to the head since it was a new head.

M_Quick

· #194 · Apr 28, 2022

No I was wondering if that may have been the cause of the cracked cylinder. No way I’d suggest trying to start it after.

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Kubi07

Discussion Starter · #195 · Apr 28, 2022

Didn't think starter fluid would cause something like that. But no, was running on 93 octane fuel

Kubi07

Discussion Starter · #196 · Apr 30, 2022 (Edited)

Just wanted to post a pic of the damage, the head seems fine, even though it looks like I need new intake valves since they got a bit bent from the piston hitting them

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M_Quick

· #197 · May 1, 2022

Be sure and dbl check your valve guides as well.

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Kubi07

Discussion Starter · #198 · May 1, 2022

At this point, I'm thinking about getting some head work done. What do you think?

M_Quick

· #199 · May 1, 2022

Idk that’s pricy, if I was you I’d just wanna get it running again.

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Kubi07

Discussion Starter · #200 · May 1, 2022

That's true, you do have a point. The reason I said it was because my intake valves seem bent probably from the piston hitting it

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