Honing for ProX piston rings
Honing for ProX piston rings
I am about to hone for my ProX piston. What grit do you guys hone with for these rings? 180 grit or 240 grit? I have a 105mm 240 grit for molly rings and was about to buy a 95mm ball hone for this cylinder. It is a 90mm piston.
The bike had a weisco in it with no holes drilled and the bridge wasn't releaved. The cylinder has good hatch marks from when the guy I bought it from just had it bored. It has PRODOGY WB scored into the bottom side of the cylinder.....I am guessing that is who did the work. I am about to drill the holes in the piston.
The bike had a weisco in it with no holes drilled and the bridge wasn't releaved. The cylinder has good hatch marks from when the guy I bought it from just had it bored. It has PRODOGY WB scored into the bottom side of the cylinder.....I am guessing that is who did the work. I am about to drill the holes in the piston.
- dannygraves
- Posts: 8020
- Joined: June 1st, 2007, 2:03 pm
- Location: Las Vegas, NV
Well, I can't seem to wait just the few minutes it takes to get a reply......I bought a 95mm 180 grit hone. I drilled the holes a little like this:
http://www.bannedcr500riders.com/board/ ... c&start=27
I haven't drilled the holes on the four corner sides. Just the big one and the bridge holes. I will releave the bridge also. I will also put in the missing Scallops.
http://www.bannedcr500riders.com/board/ ... c&start=27
I haven't drilled the holes on the four corner sides. Just the big one and the bridge holes. I will releave the bridge also. I will also put in the missing Scallops.
- britincali
- Posts: 8207
- Joined: May 31st, 2007, 7:10 pm
- Location: Barstow, CA
- teemtrubble
- Posts: 2269
- Joined: October 11th, 2007, 2:15 pm
- Location: simi valley, ca
Here let me fix that for you...south central hoon wrote:DO NOT DRILL CAST PISTONS!AlisoBob wrote:I dont think a cast piston would like that big hole drilled through it ...
DON'T EVER DRILL CAST PISTONS!
Mike
teem trubble works CR500
(Gen 3 125+CR500 motor)
If I wanted a Yamaha I would have bought a piano!
teem trubble works CR500
(Gen 3 125+CR500 motor)
If I wanted a Yamaha I would have bought a piano!
- dannygraves
- Posts: 8020
- Joined: June 1st, 2007, 2:03 pm
- Location: Las Vegas, NV
yeah, it just creates a nice spot for cracks to form, then next thing you know your piston shirt is either on the trail via a nice hole it made in the cases, or in the trans via a similar hole.
'09 kx450f 4-Poke
Gen-4 trail bike --SOLD--
Gen-3 badass trail/mx bike --SOLD--
Gen-1 built dunes bike --SOLD--
'05 klx110 --SOLD--
'95 pw80
Gen-4 trail bike --SOLD--
Gen-3 badass trail/mx bike --SOLD--
Gen-1 built dunes bike --SOLD--
'05 klx110 --SOLD--
'95 pw80
according Pro-X its machined...he might be ok with the holes.AlisoBob wrote:A ProX is cast..... you dont need a shitload of holes.
Just relieve the bridge.
ProX product line
ProX Piston KitsPiston kits
PROX pistons are precision machined on the latest, state of the art CNC equipment. The same low-expansion, low-friction piston alloy is used as is used for all major Japanese engine manufacturers.
- britincali
- Posts: 8207
- Joined: May 31st, 2007, 7:10 pm
- Location: Barstow, CA
- britincali
- Posts: 8207
- Joined: May 31st, 2007, 7:10 pm
- Location: Barstow, CA
south central hoon wrote:according Pro-X its machined...he might be ok with the holes.AlisoBob wrote:A ProX is cast..... you dont need a shitload of holes.
Just relieve the bridge.
ProX product line
ProX Piston KitsPiston kits
PROX pistons are precision machined on the latest, state of the art CNC equipment. The same low-expansion, low-friction piston alloy is used as is used for all major Japanese engine manufacturers.
My point is ALL pistons are machied, you think they come out of the mold or forge and are good to go?????
Or am I missing sarcasm here?
Coolness list by 90cr500guy
Bob's = 50/50
Cepek = cool
Solidbro = cool
Brit = loser
Stoffer = 1 up from Brit
MFDB = cool
Danny = ok
Bob's = 50/50
Cepek = cool
Solidbro = cool
Brit = loser
Stoffer = 1 up from Brit
MFDB = cool
Danny = ok
nevermind....i couldn't find anywhere on the website that said they were cast, but i found something elsewhere.britincali wrote:south central hoon wrote:according Pro-X its machined...he might be ok with the holes.AlisoBob wrote:A ProX is cast..... you dont need a shitload of holes.
Just relieve the bridge.
ProX product line
ProX Piston KitsPiston kits
PROX pistons are precision machined on the latest, state of the art CNC equipment. The same low-expansion, low-friction piston alloy is used as is used for all major Japanese engine manufacturers.
My point is ALL pistons are machied, you think they come out of the mold or forge and are good to go?????
Or am I missing sarcasm here?
proceed. sorry.
Well, now I have the new piston and the "other" new piston that has been drilled with holes. Mr. Lewis still says I can have the holes drilled and it will be fine. The question is, has someone drilled holes in the Pro X pistons and they came apart? From what i understand Mr. Lewis has and they have been fine.....or is this the reason his bikes never make it very far past start up Just kidding.....I know it's from nitrous and other crazy stuff.
good luck dude. carry a rope.....xr680r wrote:Ok, I talked to Lewis and decided to put the "Drilled" cast piston in the bike. This will be the test, I have another new piston but, that won't matter because if this one comes apart I will have to bore the cylinder anyways. I will run it hard and see if it stays together. In the end we will know.