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Messages - Adnoh

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Pilot FL400R / Re: Right Side 6306/32 Main Bearing
« on: March 11, 2012, 09:37:58 PM »
Heres a pic of the Yahama bearing. I also have a bad 350 case half donated by stixs a while back. The pilots 6306 does slip in and the yahama does not. It appers to be a touch larger in dia. I do not know the clearences yet but wil try to find out. I talked to stixs and he is saving me some 350 bearings to look over.

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Pilot FL400R / Re: stix's new engine
« on: March 11, 2012, 08:04:24 PM »
More pics. Thes are the new cut and new number

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Pilot FL400R / Re: stix's new engine
« on: March 11, 2012, 08:03:04 PM »
I had a talk with stixs this morning about his engine. We discused what changes he would like. He told me he decided to upgrade his exhaust with a clutch in his future.  After throwing out ideas back and forth He decided to change port time and areas.
 WE talked about raising the exhaust port and increase its area as well for the new AAML. We also decided to leave the transfer open alone to increase blow down time for the pipe. This should give a little more over rev and a stronger mid range. We also decided to add area to the intake and leave intake timing alone. I will need to rework his head for the new CCR and get it back to were it will need to be for the pipe.


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Pilot FL400R / Re: 400 R Lower End rebuild
« on: March 11, 2012, 07:46:51 PM »
More cool tools.

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Pilot FL400R / Re: Right Side 6306/32 Main Bearing
« on: March 11, 2012, 02:22:10 PM »
On the cleaence related to fit or preload I entered them into a woork book for comparison.  I will futher entr data and expand the book.

What I though Honda was doing may not be the case. and futher investagation and discussion is warrented. I will call a bearing company I did some work for which schooled me in bearings a while back and get there opion.  I I read the info collected correcty than theres a issue. Since engine are runnig fine I have to be wrong. I need to understand this better.

Looking at the pics and pic of the work book see it backward when it come to propper choice.

I have used bearing that came from a factory sealed engine that are what to be an unmarked or CN bering which in the case of the pilot is a prloaded press fit on both sides. Then a rebiuld factroy set that has the C3 on it which is also a press fit.

Looking at the chart with the clearences the CN and C3 has about the same amount of clearence built in to them comparing min and max.  Comparing the minium clearence numbers uninstalled the CN or what I think is the factory bearing Has a tighter tolerence by.008 over the C3. So why did honda change this, if this is the  case. I assume they did it to allow for more room for things to move or be out of alignment and still run within a given tolerence. This is fine and and I would say good in a tight engine for our application.

Now lets look at a what if.  As Live wire has mentioned on the 350 cases and I have seen in pilot engines the fitment of the bearings is what we call Loose push inand crank slide on. Knowing the preload is less  would the CN be a better choice for the use of a locking agent and still maintaing a good tolerence or amount of clearence. I look at it as if the C3 was used there would a greater chance of failure based on the lack of preload at higher load. This would indeed change the temapture balance to higher number. This is where a higher grade at a given amount of two clycle oil plays a part in the bearing survival rate. It can cussion the load or transfer it without break down at a higher temp.


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Pilot FL400R / Re: 400 R Lower End rebuild
« on: March 11, 2012, 01:16:38 PM »
Nice tool Hoodlum.

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Pilot FL400R / Re: Right Side 6306/32 Main Bearing
« on: March 09, 2012, 07:21:47 PM »
Crap I forgot I also have a Yahama bearing to through inthe mix. Found it my box a while back. Yes I'll get a pics of it to.

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Pilot FL400R / Re: Right Side 6306/32 Main Bearing
« on: March 09, 2012, 07:20:13 PM »
Good to know livewire. I pulled some pilot bearing out and a case half for the 350 and did some measuring. I have orignal 6306 that came out of factory cases and some from rebuild after orignal sets came out. Interesting thing. Factroy orignals did not have the C3 markings and the replacments did. By accident I put the 63/32 on top for the pic I will reshoot new pic. The other bearing of the set did not have the C3 mark. Cool stuff or what. I will dig out some 350 bearing and compare to the pilots.

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Pilot FL400R / Re: Right Side 6306/32 Main Bearing
« on: March 09, 2012, 12:19:30 PM »
Hers a pic of a crank and whats left of a beaing that got to hot and came apart. The crank run out is excessive and may have lead to the unbalance heat and distroyed it. I'll get the run out numbers ect forthis crank. With the damage on the cranks end its hard to get an acurate number I may need to clean it up and do a comparison. It was welded to the crank had to cut and split it off. Its a good example of a failure related to clearence,heat,load and rpm.

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Pilot FL400R / Re: Right Side 6306/32 Main Bearing
« on: March 09, 2012, 12:14:07 PM »
Cool, I have parts as well. Lets get to measuring things up. I may even have a 350 case in the garage. I looked at the ody manual and it appears there a pressure fitment as well. They mention drive n the bearing and pull the crank. Been a while since I took apart a 350 case.

The link is assume, I like the 3D viewer of the parts

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Pilot FL400R / Re: Right Side 6306/32 Main Bearing
« on: March 09, 2012, 10:58:20 AM »
Good your into the discussion livewire. More the marrier. You have had many engine apart and I,m sure you have lots to add.

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Pilot FL400R / Re: stix's new engine
« on: March 08, 2012, 11:22:55 PM »
last for today. I put the cc in a cup to show how much fluid or volume there is at TDC

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Pilot FL400R / Re: stix's new engine
« on: March 08, 2012, 11:20:36 PM »
sorry,messed up a couple

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Pilot FL400R / Re: stix's new engine
« on: March 08, 2012, 11:16:48 PM »
more pics

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Pilot FL400R / Re: stix's new engine
« on: March 08, 2012, 11:14:20 PM »
more pics

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