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cracked bridge....
Posted: October 13th, 2010, 6:10 pm
by qkenuf4u
ok i know its been discussed and ive searched/read every post i could find... but really didnt get my answer...
i had JERRY HALL do my crank and bore my 92 cylinder. got it back yesterday and started checking things out.... noticed the bridge is cracked... its relieved about .002 (SM says .003-.004) so im prob. gonna run it back a bit more... anyways i ask jerry today about running it and he said run it and for awhile and tear it down to see if the cracks destroying things (not quite his words) really dont have the money to tear this thing down all the time to check that crack..
guess my question is, how many of you have the crack and have run the bike a long time with no problems ? how much clearance did you run ? anything special i can do to the crack to help it not catch a ring ?
thanks
lance
Posted: October 13th, 2010, 7:34 pm
by 100hp honda
cant imagine why he didnt call to relay the message. never had a problem with his work before. hope all the professionals aint turning into hacks but you have to wonder
Re: cracked bridge....
Posted: October 13th, 2010, 7:40 pm
by AlisoBob
Re: cracked bridge....
Posted: October 13th, 2010, 8:01 pm
by qkenuf4u
he said run it and keep an eye on it/pull the head and see if its chewed things up/changed/moved etc...... his brother did the bore/hone job and missed the crack. pretty much said hes seen it more than enough and it shouldnt cause a problem but to keep an eye on it... ive been using jerry for the last 4+ yrs as my machinist on my customers bikes so i do/believe what he says to do..... ya i would rather had have had him catch it and let me know it was cracked before i got it back... could have welded it and then bored it for me but im curious if welding it even holds up ????
im gonna run it down a couple more thousandths and drill the cooling holes. he said that might help save it till i can replace the cylinder..
Re: cracked bridge....
Posted: October 13th, 2010, 8:10 pm
by 100hp honda
qkenuf4u wrote:his brother did the bore/hone job and missed the crack.
. seen his brother but dont know much about him. pretty sure hes just a "helper" with limited knowledge obviously
. jerry would fix it for free if you send it back im positive. im betting he was gone and left the brother to hold down the fort. i know i wouldnt run a cracked bridge regardless what anyone says but thats just me. you think hes gonna pay if it blows up ? ...no
actually just cut the fucker out, if its stock ports. you can do that yourself.
Re: cracked bridge....
Posted: October 13th, 2010, 8:17 pm
by qkenuf4u
100hp honda wrote:qkenuf4u wrote:his brother did the bore/hone job and missed the crack.
. seen his brother but dont know much about him. pretty sure hes just a "helper" with limited knowledge obviously
. jerry would fix it for free if you send it back im positive. im betting he was gone and left the brother to hold down the fort. i know i wouldnt run a cracked bridge regardless what anyone says but thats just me. you think hes gonna pay if it blows up ? ...no
actually just cut the fucker out, if its stock ports. you can do that yourself.
from what im reading that could screw with the rings since its a big ass hole if ya cut it out... anything special i would need to do to make it work ? i have a carbide cutter and could def cut it out with ease.. polish the exhaust port afterwards ?
or just leave it rough ?
Posted: October 13th, 2010, 9:43 pm
by maddog1927
roostius cut the bridge out on one of his that was cracked. has pictures of it in one of his tech references. What is the width of the exhaust port. 65% of bore is the magic number I have heard.
Posted: October 13th, 2010, 10:00 pm
by sugarshane
I use Jerry on everything that I need machined. I have heard great things about Eric Gore and GSS who are local also but I stick with Jerry due to his knowledge, workmanship and customer service. I have never been unsatisfied with anything from him and he makes certain I am happy with the work when I pick anything up. His brother has more than "limited knowledge" also. Although Jerry has a degree in mechanical engineering so he also knows the physics side of engine building. I would venture to say that he would repair the cylinder to keep you happy. I know a few other guys here that wont go to anyone else because of how he is.
Posted: October 13th, 2010, 10:21 pm
by qkenuf4u
sugarshane wrote:I use Jerry on everything that I need machined. I have heard great things about Eric Gore and GSS who are local also but I stick with Jerry due to his knowledge, workmanship and customer service. I have never been unsatisfied with anything from him and he makes certain I am happy with the work when I pick anything up. His brother has more than "limited knowledge" also. Although Jerry has a degree in mechanical engineering so he also knows the physics side of engine building. I would venture to say that he would repair the cylinder to keep you happy. I know a few other guys here that wont go to anyone else because of how he is.
100% agreed... gonna call him tomorrow and see what he says about fixing it and how much if anything..... i really wish he had seen it before shipping it back to me and wasting my return shipping label....
Posted: October 14th, 2010, 3:57 pm
by 100hp honda
after you do the boring process you measure the work to make sure 100% its correct. then you chamfer ports. if you miss a cracked bridge after those two steps then you would be considered having "limited" knowledge. a real professional dont miss that kind of shit. call it what you want. like i said before, my speculation is jerry was gone and left the brother to hold down the fort. cracked bridge was sent out the door. 100% sure jerry would fix it for free, because if it was him that actually did the work it would of been fixed right from the get go. cutting the bridge out aint hard and only takes a few minutes if you dont feel like shipping it back. dont want to talk you into something you dont feel comfortable doing though.
Posted: October 14th, 2010, 4:07 pm
by qkenuf4u
talked to him for another half hour this morning about all this (that man can talk your ear off
)...
he isnt offereing to fix it cause he see's no reason to worry about it really... he knows its not uncommon and he knows it will just crack there again after/if fixed (ive read that on here more than once also)
as ive said hes told me to run it easy for a few tanks and pull the head to see if its moving enuff to tear things up (im guessing i will know alot sooner if it is gonna hit anything) pretty much we've come to agree that im gonna relieve it back to .004 and drill the holes to help keep it a bit cooler...
as for cutting the bridge out im going by his advice there also.... not to do it (dont remember his reasoning behind it
)
if you guys have a magic fix for this im sure he would love to hear about it..
100hp honda wrote:after you do the boring process you measure the work to make sure 100% its correct. then you chamfer ports. if you miss a cracked bridge after those two steps then you would be considered having "limited" knowledge. a real professional dont miss that kind of shit. call it what you want. like i said before, my speculation is jerry was gone and left the brother to hold down the fort. cracked bridge was sent out the door. 100% sure jerry would fix it for free, because if it was him that actually did the work it would of been fixed right from the get go. cutting the bridge out aint hard and only takes a few minutes if you dont feel like shipping it back. dont want to talk you into something you dont feel comfortable doing though.
Posted: October 14th, 2010, 4:13 pm
by AlisoBob
qkenuf4u wrote: if you guys have a magic fix for this im sure he would love to hear about it..
Tell him to sub out his work, up to Winkler Canada.... They got this new fangled thingy-a-bob up in the great white north.... Its called a magnifying glass.....
Posted: October 14th, 2010, 4:21 pm
by 100hp honda
there is no magic fix. weld it or cut it out. or run it
. cracked bridges aint common. ive never personally never seen one. seen a few on these websites, but theres thousands of people without cracked bridges so that kind of puts it in perspective. "common" to me meens about 1 in 4 would be cracked. definatly not even close to that.
Posted: October 14th, 2010, 4:23 pm
by south central hoon
i've been running mine with a cracked bridge for 4 years. 2 bore jobs later (the latest bore was GSS) its still all good. just relieve the damn thing and get on with life.
Posted: October 14th, 2010, 4:27 pm
by 100hp honda
no one said it WONT work. but the first time it snags a ring even the smallest amount its all over but the crying
. be back at sqaure one again, but with damage
Posted: October 14th, 2010, 4:30 pm
by qkenuf4u
AlisoBob wrote:qkenuf4u wrote: if you guys have a magic fix for this im sure he would love to hear about it..
Tell him to sub out his work, up to Winkler Canada.... They got this new fangled thingy-a-bob up in the great white north.... Its called a magnifying glass.....
as i said he had the brother do my cylinder so he didnt see it himself... its not like this is a brand new thing and has never happened before.. how many pics are on this site alone of cracked bridges ??? lots and lots....
hes fixed more than enough that have just cracked again after being fixed...
plus there are a ton of people on here that have fixed the crack and had it crack again after a little use....
if you have a magic fix for this im sure he would love to hear your ideas/theories.....
we talked about sleeves etc.. even those crack eventually... it is an 18yr old cylinder thats been bored before so not like its brand new and only has 2hrs on it..
talked about the type rod thats needed to weld etc......
im all ears on what you think the fix is for this ? i would rather not have to part it out/sell the bike when this thing sticks after a 10min ride.... if it does stick then it will be going down the road and ill stick to a 4-poke for street use...
now before ya bust me on thinking a 2t is gonna be reliable on the street.....my first cr500 was full street legal and i rode it for hours on end on the road.. 60mph down the road was as nice as my zrx1100 street bike... but with that bike i bought it setup from a hare-scramble guy so he had everything PERFECT on that bike... dont know what kinda porting/jetting/etc. he had done on that bike. plus it had an IMS wide ratio gear box so that helped keep it off the pipe at cruise speed.... again wish i knew everything about how that bike was setup....
Posted: October 14th, 2010, 4:33 pm
by 100hp honda
lots and lots of cracked bridge photos ?? i dont think so. might be a handful with both sites combined. just run it dood, southcentralhoon said it be aight
Posted: October 14th, 2010, 4:33 pm
by qkenuf4u
100hp honda wrote:there is no magic fix. weld it or cut it out. or run it
. cracked bridges aint common. ive never personally never seen one. seen a few on these websites, but theres thousands of people without cracked bridges so that kind of puts it in perspective. "common" to me meens about 1 in 4 would be cracked. definatly not even close to that.
pretty much what he said.. 2 out 10 was his guesstamate...
Posted: October 14th, 2010, 4:36 pm
by qkenuf4u
south central hoon wrote:i've been running mine with a cracked bridge for 4 years. 2 bore jobs later (the latest bore was GSS) its still all good. just relieve the damn thing and get on with life.
pretty much where im going at this point.....
thanks for all the replys.... its all a learning process for me and ill take it all in and use it as constructive criticizm/knowledge.....
Posted: October 14th, 2010, 4:37 pm
by qkenuf4u
100hp honda wrote:lots and lots of cracked bridge photos ?? i dont think so. might be a handful with both sites combined. just run it dood, southcentralhoon said it be aight
more than enough to worry me...
...... can i quote you on the southcentralhoon ?? ill send the bill your way when it sticks....
Posted: October 14th, 2010, 4:57 pm
by AlisoBob
qkenuf4u wrote: its not like this is a brand new thing and has never happened before..
Thats my point... The bridges crack enough that the first thing Jerry ( or his brother, or his mexican, or what ever....) should have done is inspect the bridge, and given you your options then and there...
Not let you discover it, and then tell you to go pound sand.
Jerry should credit you the cost for the bore and hone towards a resleeve job, if thats the way you want to go.
Telling you to "run it easy, and inspect it from time to time" is fucked up.
Throw it through his god dammed windsheild if he wont stand behind his, or his brothers work.
Save another Hoon the hassle....
Posted: October 14th, 2010, 5:00 pm
by AlisoBob
qkenuf4u wrote:south central hoon wrote:i've been running mine with a cracked bridge for 4 years. 2 bore jobs later ...
2 bore jobs in 4 years? Remind me not to run whatever oil and airfilter you run.
Posted: October 14th, 2010, 5:14 pm
by qkenuf4u
south central hoon wrote:i've been running mine with a cracked bridge for 4 years. 2 bore jobs later (the latest bore was GSS) its still all good. just relieve the damn thing and get on with life.
hmm seems to me that SCH should have got a credit also if
GSS didnt do anything about his crack
so what exactly would
YOU DO BOB ???? have it welded so it can crack again ??
i wish i had $$$$$ to just buy a new cylinder/piston and call it done...
Posted: October 14th, 2010, 5:38 pm
by Roostius_Maximus
welding is out of the question. its a cast liner, theres no way you can build it up repair it like you would a castiron cylinder head. btw, most cast iron repairs fail.
i had a cracked one, i cut it out. yes it was in a sleeve that had been installed and bored twice.
Posted: October 14th, 2010, 5:51 pm
by qkenuf4u
Roostius_Maximus wrote:welding is out of the question. its a cast liner, theres no way you can build it up repair it like you would a castiron cylinder head. btw, most cast iron repairs fail.
i had a cracked one, i cut it out. yes it was in a sleeve that had been installed and bored twice.
jerry said it can be welded with certain rods but its very tough to do and will just crack again.. one rod he said is high in nickel and its very hard to bore/cut back out once built up...
i would remove the bridge but sounds like all that does is smear rings and i would rather avoid that also...