oggo69 wrote:not getting into a slagging match as such but sticking to the pics , if an apprentice drilled that hole off centre he would be on sweeping and coffee duties for a month .
fogive my ignorance but are the bores done on a mill , lathe or line borer ?
DeWalt cordless
00'cr500 trailclimber
93'cr500 beater
92'cr500 hillclimber
08,KTM SR500r hillclimber (conv)
89'cr 500 bent frame
04'crf230(wifeys)
02' cr125(sons)
02,pro jr 50 open exh. hill climber(sons)
02'sx65(sons)
03'xr50(sons)
He still has some pics of glens work done back in 08'
The only reason I can come up with for the holes in the skirts is the finish of the cyl was so rough that it was scoring the piston skirts at the 4 corners because the cyl couldn't hold the oil so his fix was to drill some holes in the pistons to push oil in those areas. It was a bandaid for a incorrect cyl wall finish??????
00'cr500 trailclimber
93'cr500 beater
92'cr500 hillclimber
08,KTM SR500r hillclimber (conv)
89'cr 500 bent frame
04'crf230(wifeys)
02' cr125(sons)
02,pro jr 50 open exh. hill climber(sons)
02'sx65(sons)
03'xr50(sons)
He still has some pics of glens work done back in 08'
The only reason I can come up with for the holes in the skirts is the finish of the cyl was so rough that it was scoring the piston skirts at the 4 corners because the cyl couldn't hold the oil so his fix was to drill some holes in the pistons to push oil in those areas. It was a bandaid for a incorrect cyl wall finish??????
there was another dude that got a shit gss bore way before 4Z. think it was back in '06 or some where around that time.
blownbillybob wrote:I see someone has been working on some new fixtures!!!
NICE!!!!!!
X2
I asked Adam why it isnt being bored with the torque plate on? He said his current one isnt compatible with the with of the boring head cross-section.. but he's designing one soon so that from start to finish the cylinder will be properly stressd.
x 491
For now, he leaves it undersized enough so the final honing still take it to perfectly round with the torque plate on...
I need to leave atleast .004", honing shows me the load it's taking, says if I leave .003" it's stil not to the bottom of the disturbed material from the boring process.
= a full density cylinder wall that will last longer and not immediately wear out
There's more to this R&D Than some recognize
Last edited by Roostius_Maximus on April 14th, 2011, 9:25 pm, edited 1 time in total.
blownbillybob wrote:I see someone has been working on some new fixtures!!!
NICE!!!!!!
X2
I asked Adam why it isnt being bored with the torque plate on? He said his current one isnt compatible with the with of the boring head cross-section.. but he's designing one soon so that from start to finish the cylinder will be properly stressd.
x 491
For now, he leaves it undersized enough so the final honing still take it to perfectly round with the torque plate on...
I was wondering the same thing, thanks Bob for the catch and 'spanation
Not usually, if it comes and goes in the mail with a value under 200$ or so it slips by, occasionally i have one come in and i pay 6% of the declared value. Never heard of any such charges when heading back to the USA.
I've done the shipping deal for a few years now, decompressors, parts, whatever, never had an item lost
Roostius_Maximus wrote:I need to leave atleast .004", honing shows me the load it's taking, says if I leave .003" it's stil not to the bottom of the disturbed material from the boring process.
= a full density cylinder wall that will last longer and not immediately wear out
There's more to this R&D Than some recognize
Leaving the cyl a tho smaller is know big deal when using a power hone ,maybe 2 mins more hone time on a single cyl, now if your hand honing or using a rod machine with a AN hone head then forsure you would want to bore with a torque plate just cause that's a tho more you have fight (hone) out of it.
And ain't even going ther for a ball hone
00'cr500 trailclimber
93'cr500 beater
92'cr500 hillclimber
08,KTM SR500r hillclimber (conv)
89'cr 500 bent frame
04'crf230(wifeys)
02' cr125(sons)
02,pro jr 50 open exh. hill climber(sons)
02'sx65(sons)
03'xr50(sons)
no, i'm saying the loose material from the boring tip is not completely removed unless we go .004"
I had been sizing them on a rod machine with sunnen GY25J67 stones, worked excellent and it can be done true and strait, and it didnt take long, but the rottler has a guage to show the load of the stone, so i can tell if the bore is properly sized past where the boring head loosened it.
OU812 wrote:I sent a barrel to Glen, shame the pic does not really show how bad it was but you can see it some what. the bridge goes totally snaky on both sides, not a good thing. When I went to install the new supplied piston it would not even go half way in. Glen says "it just dirty clean it" WTF? sorry dude it ain't dirty. sent it back on my coin, comes back to be and he took the piston and sanded it, looks like a poor hand job, paid big money for amateur work.
He them blames the work on some kid he had working in the shop "Had to let him go"
Gee glad I was your guinea pig for your minimum wage kid learning to port.
you can cut that exhasut that big, aslong as its the same width all the way arround and doesnt blow behind the flange.
You can make it bigger without a lip and make a flange, but its super crappy the way its done in that pic
x 491
