Penton Owners Group

General Discussion => Penton Talk => Topic started by: Chakka on December 27, 2007, 04:40:31 PM

Title: 175 Piston Question
Post by: Chakka on December 27, 2007, 04:40:31 PM
In the process of my engine rebuild I dropped a piston and a triangular piece approx 3/16" x 45deg broke off the front side lower left corner. Could a radius be ground to smooth the sharp edges and installed or am I risking a catastrophic failure? If so looks like I learned an expensive lesson and will have to call Al B.

Chris
Title: 175 Piston Question
Post by: G Ellis on December 28, 2007, 09:59:06 AM
If it was my motor I would buy a new piston. If it was on the intake I would use it. Before buying a new piston,have the bore checked out to see if it is out of spec.  Hope this will help  Later Gary
Title: 175 Piston Question
Post by: Chakka on December 28, 2007, 05:49:50 PM
Thanks Gary,

I was afraid of that but my bad so I guess I will have to order a new one. I will follow your advice and check the bore as well before the order is placed. After all the hours spent rebuilding I need to ensure it's reliable. The plan is to put the engine in an MC5 frame and build a replica of Dane's 76 ISDT Bike.

Chris
Title: 175 Piston Question
Post by: G Ellis on December 28, 2007, 06:28:22 PM
So do you have a 6 fin motor? If so good luck finding pistons for that motor. If you have some photos of the piston maybe it will be ok to use. I have some pistons, Al has very few of them for a 6 fin motor. You can email me at [email protected]  or call 217 260 0237  Later Gary
Title: 175 Piston Question
Post by: DKWRACER on December 28, 2007, 07:57:23 PM
Hi Chris! I do have a +060 short piston, and the swing-arm that you wanted, waits, in the wings.
Tom Brosius
Title: 175 Piston Question
Post by: G Ellis on December 28, 2007, 08:05:22 PM
Hey no fair Tom I need a .060 short piston. :D:D Later Gary
Title: 175 Piston Question
Post by: Chakka on December 28, 2007, 10:27:26 PM
Gary - I just checked all 3 175 cylinders I have. All are 7 fin engines :( So I guess my plan on the ISDT bike are out. The piston that goes with the top end I want to use is an Elko and stamped 63.75, 1149d. Here is a link to a picture of the damage....on second thought it looks bad and I should get a new piston.

Tom - I busted my piggy bank today so I will be mailing you a postal M/O for the MC5 Swingarm this weekend.

http://i17.photobucket.com/albums/b60/chakka141/random%20Penton%20Pics/DSCF0004.jpg