79 Invader 440

[gixxer6]

Does it look to have been ported? 

[invaderpat]

We will find out tomorrow (clutch puller came in this afternoon!) We can see that it has been split open and was apart somewhere in the past. Correct me if I'm wrong, the uprate kit was installed after delivery, correct? When it is apart, will pictures tell you the story? Measurements? What am I to look for?

[invaderpat]

Well, its apart. Not sure of how to measurte the ports from the inside. My caliper wouldn't fit inside. Ports look pretty big, but again, don't know what standard looks like. Ideas?

[invaderpat]

 Here is the intake side. Should have went with the above.

[gixxer6]

Easiest way to tell is to see if the casting marks inside the ports have been removed.   Looks like they have not, but it's hard to tell with the shadows in the pictures. 

Yes, the kit was offered as an add on after the fact.  It appears as though most didn't opt to have their cylinders sent in for the porting.  I have yet to see one with the kit pipes that has been ported. 

[invaderpat]

OK, casting marks? Smoothed out like polished racing heads?

[gixxer6]

Yes, if it has not been ported, the ports will be rough.  If it has been ported, it will be smooth and "polished". 

[invaderpat]

Just looked at a cylinder a while ago.I have a new picture. In some ways it loks like someone may have done something, maybe not. It isn't perfectly smooth,but then again?

[gixxer6]

It looks like there has been some work done.  It would be interesting to measure them and compare against the stock port dimensions in the FSM.   

[invaderpat]

Where can one find the stock port dimensions?

[gixxer6]

Port dimensions are shown in the specs section of the factory service manual. 

[gixxer6]

This is the first I've seen an Invader with kit pipes that has ported cylinders that were potentially done by Kawasaki.  Do you see any engraving or markings on the outside of the cylinders?  Did the PO specifically say that he had Kaw do the porting? 

[invaderpat]

Well, I would have to call the previous owner and check his memory. The engine is at my pals garage. When I get back to it, I'll look at things carefully (for any markings).Awaiting parts to go back together. I'll try to measure things too.

[invaderpat]

Still don't have quite the correct tool to measure the ports. But, did look at the cylinders more carefully. Does this stammp mean anything?

[invaderpat]

Better picture.