Author Topic: fixing stud found some other issue (Read 4887 times)

jamieg45 · « **on:** July 22, 2014, 03:19:45 AM »

So after the stud broke on the silver lake trip at the cylinder base. I tore it apart tonight after work and replaced the front 2 studs so far. (I have to order more to replace all and give 2 back to who gave me 2). I found that my piston has some deep grooves in it but no marks on the cylinder walls themselves. I will post pics when I get up.
Just glad the stud broke and I pulled it apart and caught this early enough. Gonna order a new piston and have the cylinder looked at as well. Just a little stumped as to why and how come no marks on cylinder wall. Maybe some of you all can chime in and help me out some.

rk88r · « **Reply #1 on:** July 22, 2014, 08:42:00 AM »

Maybe some it sucked up some banshee parts. Chunks of ring flaking off? Reeds?

Burns363R · « **Reply #2 on:** July 22, 2014, 11:20:52 AM »

Why would the studs break? Who built the motor? Not trying to start anything, but im seriously curious.

Pumashine · « **Reply #3 on:** July 22, 2014, 11:30:11 AM »

Quote from: jamieg45;39615

Just a little stumped as to why and how come no marks on cylinder wall.

The piston is made of aluminum. It is only 1/3 as strong as steel. Which means it scars much more easily than the cylinder wall. Check your dome for any pitting. If there are pits on the dome your rod bearing or wrist pin bearing may be starting to let go.

jamieg45 · « **Reply #4 on:** July 22, 2014, 11:41:12 AM »

No pitting in the dome, looks as new as I put it in Tony.
Kyle the cylinder came from CT and then ported by jms who was Mike larocco's engine builder and team Honda 125's engine builder too. The stud was old oem for the cases. I am putting in the longer one's for the 310 now.

jamieg45 · « **Reply #5 on:** July 22, 2014, 11:48:03 AM »

OK got it figured out. Called the engine man. It ran just a little lean, most likely at the dunes and pry when the stud broke, and it suckered someair.

Pumashine · « **Reply #6 on:** July 22, 2014, 12:07:34 PM »

Quote from: jamieg45;39638

I am putting in the longer one's for the 310 now.

I have 10 sets of those if you need them.

jamieg45 · « **Reply #7 on:** July 22, 2014, 12:26:42 PM »

Quote from: Pumashine;39641

I have 10 sets of those if you need them.

Just a few minutes late Tony, they had 4 in stock and I ordered 4 more to have for spares. I can call and cancel how much for a set of 4 from you bud shipped.

Pumashine · « **Reply #8 on:** July 22, 2014, 12:45:31 PM »

I am going $8 a set. Shipping is $3 or $6 depending on the time frame. I just got them so they could be ordered with a spacer plate.

jamieg45 · « **Reply #9 on:** July 22, 2014, 01:21:50 PM »

Quote from: Pumashine;39645

I am going $8 a set. Shipping is $3 or $6 depending on the time frame. I just got them so they could be ordered with a spacer plate.

I will let you know tony, rite now I'm good. The order was already put in and I'm gonna order my piston friday. So hopefully I can have it back together and ready to hit the fair race on August 1st.

Hawaiiysr · « **Reply #10 on:** July 22, 2014, 01:32:17 PM »

Wouldn't hurt to make sure the mating surfaces are flat before reassembly.

jamieg45 · « **Reply #11 on:** July 22, 2014, 01:36:36 PM »

Quote from: Hawaiiysr;39649

Wouldn't hurt to make sure the mating surfaces are flat before reassembly.

Exactly bud, I'm gonna check all of them. And I have a new spare spacer plate as well. I'm gonna make sure it's the same thickness as well. Done these top ends many times

silverlake250r · « **Reply #12 on:** July 22, 2014, 01:51:51 PM »

Sounds like a super important fair race, I'm sure you're heavily sponsored!

jamieg45 · « **Reply #13 on:** July 22, 2014, 10:35:08 PM »

Quote from: silverlake250r;39651

Sounds like a super important fair race, I'm sure you're heavily sponsored!

What do you mean marc, they are the ones who had the Walsh in the show room and who I get my race gas from as well. They are a big help to me and new I wanted to do this fair race and the owner is a good friend because of I have many sales to friends from them.