Measuring Device for Motors

[landracing]

List,

I have contacted the distributor of a bore and stroke guage that the motorcycle guys have been using. This tool eliminates the need to tear the complete engine down, all you need to do is remove spark plugs and be able to rotate the motor and read a micrometer and do simple math.

The same tools the SCTA has been using for a few years and are an approved method of measuring the engines.

For this tool to work properly the spark plug holes must be directly above the center of the piston. 10mm or 12mm plug holes.

The distributor will give us a small break on the tools at $300 each plus shipping from my place.

Monies must be received in advance, I cannot support a big group purchase. To get this pricing we need to have at least four..

The tool if you were to buy directly from him is $325 + $25 shipping.

So by doing this group purchase you can save about $40.

I have two that have committed and 2 more that will get back to me this next week.

The tool comes in two specs.
FS Tool
Min of 45 mm stroke (this allows tool to open) and maximum bore of 77mm

Med Tool
Min of 53 mm stroke  (this allows tool to open) and maximum bore of 100mm

Let me know if you have anyother questions.

Jon

[dwarner]

Why do you need a tool when the tech people have them available?

[landracing]

Because they are fragile and they break.

If you have your own then you dont have to worry.

We asked to use one a couple years ago and told it was lost in the motorcycle department or wouldnt work on specific bike because of bore and stroke minimums for the tool.

4 bikes measured with entrants tool, gather funds for the use of tool and called it the day.

Also the BUB meet has allowed use of the tool as well. FIM also allowed the use of the tool. Can be used at USFRA meets also. Can be used at ECTA as well... Aussies might even like it....

Just trying to cover ones own arse.....

Jon

[John Noonan]

Wow, what great information, I remember when I told the head of the bike inspectors years ago and was told to buy one and the SCTA would pay me for it, I did and was told they would get their own..

Then while an SCTA inspector was measuring my bike it was broke and I was out the 325.00 plus shipping..now between, Tom, Russ and Rob etc, they have it covered, FIM liked it so much that Mike (Ack Attack) gave them his to use for other record certifications.

Jon, thanks for getting the bike guys up to speed..

[Seldom Seen Slim]

One of these days they'll invent a device for measuring those of us with off-center holes (...said the proctologist who has a ZX12R).

I'm quite ignorant on the subject so will ask.  What would it take to design one of these that would work for those of us where the sparking plug isn't smack dab in the middle?  Who do I gotta ask to invent this -- the guys at my local engineering college, or maybe the Off-Center Spark Plug Hole Manufacturing Corporation?

(No, I'm not going to switch to a 'Busa just to avoid undoing the cams in impound...)

[landracing]

Wish I had an answer for that John,

Looks as if you will be pulling cams for the time being...

Jon

[jimmy six]

Make your own for your own engine. I did it for the 12 port GMC I was using.  Plug was 1-1/2" off center. I was lucky to have a flat top piston. I took pictures how it worked with the head off and on. Then did it at Bonneville plus showed the picts to the certifier and it was allowed....Think outside the box... Good Luck

[landracing]

thanks jimmysix, you have any pictures you can post of the tool???

Jon

[JackD]

He took that idea from the bikers that have used those methods since 1980.
The 2nd car guy I saw use it was Elmo on the Ardun.
"History does repeat it's self if your memory is short enough."

[John Burk]

O             O<---3"
                            \           /
                              \       /
                                \   /
                                  X<----Pivot
                                 /  \
                                /     \
                              /         \
                            O           O<---3"
             
       If the pivot area is shaped right this would work with any plog hole .

[John Burk]

My original "sketch" described an X shaped tool .

[dwarner]

How do you measure the stroke with this tool?

DW

[JackD]

will be it's own reward.
The CC beaker was used at Bonneville many years ago and solved
 many problems that could not be handled another way. In most cases.
 Pulling a head is just lost time for everybody.
 How much time are you willing to spend ?  
It looks like some of the "Years ago" are not ago enough.
"It seems to be more hysterical than historical."

[John Burk]

Dan
          Stroke measuring tool for an off canter plug
                   
..................l.l<----------guide for a depth gauge
..................l.l.......l.l..
................. l.l===l.l<---sleeve over a stud screwed in a head bolt hole
..................l.l.......l.l..

        When the garage is cold it's more fun to sit in front of the wood stove
      screwing around drawing pictures on the computer .

[jimmy six]

Jack D. has no clue where I got the idea for what I made. None, Niet, Nada. etc...He has no idea what it looks like or how it was made.