88" crank in a 96"block
HDF Community Team
Joined: Jun 2006
Posts: 12,776
Likes: 2,607
From: san antonio
Yes, that's what I was thinking. And I say that because the bike ran like a scalded dog before, and now it run's ok but not like before. The compression seem's to be way down, and I say this because I can now run 89 octane without pinging. Next tank will be 87 octane, just to see if it pings. I also forgot to metion that I have a t-max auto tune and since the rebuild I have gone through 10 +degree's of timing and still can't get it to ping. I know that pinging is not good, but I am trying to find the sweet spot in the timing and with a 10+ degree change I thought I would have been there by now.
Run a compression test and post the results.
Thread Starter
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Tourer
Joined: Nov 2007
Posts: 442
Likes: 4
builder say's nothing was changed. I am going to do a dyno pull to compare. It was at 99 horse 107 torque. dyno don't lie. Some indy's however makes me wonder. I think a compression test is a good idea, but all it's going to tell me is what I already know. It is a 107 with a reaper 574 cam. street port heads.
I also forgot to metion that I have a t-max auto tune and since the rebuild I have gone through 10 +degree's of timing and still can't get it to ping.
It is a 107 with a reaper 574 cam. street port heads.
HDF Community Team
Joined: Jun 2006
Posts: 12,776
Likes: 2,607
From: san antonio
builder say's nothing was changed. I am going to do a dyno pull to compare. It was at 99 horse 107 torque. dyno don't lie. Some indy's however makes me wonder. I think a compression test is a good idea, but all it's going to tell me is what I already know. It is a 107 with a reaper 574 cam. street port heads.
Thread Starter
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Tourer
Joined: Nov 2007
Posts: 442
Likes: 4
So my research was correct! I took my scoot in for a base gasket leak to the builder that built my motor. Now I have said from the beginning that I thought he may have put the wrong crank in my 07 sg, but I was told it more than likely was not the case. Well I get a call from the builder and he say's your bike's going to be down for awhile. So I ask why? He proceed's to tell me that he installed a 88" crank in my 107 motor! The first thing I said to him was " So I guess I knew what I was talking about when I first asked. He apoligized and said he will make it right. That mean's we are sending out a 4 3/8 stroke crank to revolution performane to get welded, plugged and trued. Then once it comes back from them, it's time for some head porting. Then I will have a bullet proof motor to whoop on! WHOOOOPEEEEE!!
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Road Warrior
Joined: Apr 2008
Posts: 1,899
Likes: 8
From: Aurora, IL
06 dyna cranks and 07 dyna and touring cranks are from what I am told interchangeable. It would be possible to put a 06 88" dyna crank in an 07 touring bike and also put the pistons in.....It would have very little compression though.
Outstanding HDF Member
Joined: Jan 2010
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From: earth
06 dynas were 96", they were the guinea pigs