arena314 Posted April 21, 2016 Report Share Posted April 21, 2016 Ok so I had horribly low compression in both cylinders on my 03. Both read under 100 psi so I decided its time for a tear down. I was never inside this banshee before so it was all new to me. Nothing unusual and everything came off pretty easy. Bone stock porting and bore it even looked like stock pistons to me. The rings were completely worn I'm surprised the bike still ran I'm going to send my cylinders out and have them bored ported and polished and throw some wiseco pistons in. My questions are what's the best way to clean the carbon off the domes? I'm keeping the stock head on it for now due to having other things to fix and have to keep the cost down a little. So what's the best way to clean the carbon off the stock head and also when removing the jugs some metal shavings came off and are laying on the case around where the fuel shoots up through the crank case into the cylinders what's the best way to clean that and how bad would it be if just a few of those shavings fell into the crank case? Lmk and sorry for the long post. Thanks in advance Quote Link to comment Share on other sites More sharing options...
camp0429 Posted April 21, 2016 Report Share Posted April 21, 2016 Be a good idea to send that crank in for inspection/weld Quote Link to comment Share on other sites More sharing options...
arena314 Posted April 21, 2016 Author Report Share Posted April 21, 2016 Yeah but I'm not tearing it down the the crank this time im only doing a top end on it then next rebuild im going to do it all Quote Link to comment Share on other sites More sharing options...
trickedcarbine Posted April 21, 2016 Report Share Posted April 21, 2016 If you want that thing to live, it needs to have the cases split. Metal from the case is no good. Crank is probably toast or at a minimum on borrowed time. Also. If someone is porting it, you should be getting domes as well. Quote Link to comment Share on other sites More sharing options...
Larry's Shee Posted April 21, 2016 Report Share Posted April 21, 2016 Cost of splitting cases , little bit of 3bond. Cost of debris 10X size of bearing clearance taking out engine, minimum of$900.00 ! Plus while it's apart you can throw in new crank seals !! Do you know why it had low compression? Just worn out? Quote Link to comment Share on other sites More sharing options...
arena314 Posted April 21, 2016 Author Report Share Posted April 21, 2016 The metal isn't from the crank its from when i was taking off the jug on the left side I had to move it back of forth alot to get it off the studs. The metal is from the studs. And it had low compression due to worn rings Quote Link to comment Share on other sites More sharing options...
bigweav81 Posted April 21, 2016 Report Share Posted April 21, 2016 Ahhh fuck it do what you want, and get a shit load of I told you so later when it takes a shit. sent from yo mammy house. Quote Link to comment Share on other sites More sharing options...
Bennett131 Posted April 21, 2016 Report Share Posted April 21, 2016 It sounds like youre going to half ass this thing, its probably going to bite you. Quote Link to comment Share on other sites More sharing options...
arena314 Posted April 21, 2016 Author Report Share Posted April 21, 2016 Why would it take a shit? The crank is fine. It was fine before the tear down and its fine now that I'm inside the motor theres nothing wrong with it. I don't understand why you guys think I need a crank when thats not the reason it needed to be rebuilt anyway. It's just a top end rebuild. Never heard anyone say when your top end needs to be rebuilt then you also need to do a crank Quote Link to comment Share on other sites More sharing options...
arena314 Posted April 21, 2016 Author Report Share Posted April 21, 2016 I just simply asked how to go about cleaning carbon and debris and all the sudden you guys come at me with all this shit Quote Link to comment Share on other sites More sharing options...
Bennett131 Posted April 21, 2016 Report Share Posted April 21, 2016 You clean the debris by splitting the cases. While youre in there (since youre having your top end ported) it would be a great idea to have your crank welded and checked out considering the extra stress you will be putting on it. How do you know the crank is good? Did you check it? If so, how? Porting the cylinders and doing a rebuild with a 13 year old crank is exactly my definition of half assing shit. Do what you want, it isn't my bike nor my money. 1 Quote Link to comment Share on other sites More sharing options...
camp0429 Posted April 21, 2016 Report Share Posted April 21, 2016 Nobody is sayin you definatly need a crank, were sayin pull motor, split cases and have that crank verified that it is still good and true, then get it welded to prevent possible seperation, more so critical when you add porting and compression. I rebuilt my motor a couple years ago, damn sure wasnt gonna slap a new top end on it without the crank being checked, everything LOOKED fine, come too find out both rods were bent and it had a bad bearing. Couldn't tell it had any issues at all. How do you think that would have held up if it wouldnt have gotten repaired properly? Quote Link to comment Share on other sites More sharing options...
arena314 Posted April 21, 2016 Author Report Share Posted April 21, 2016 Yeah true but I'm not adding power to it that it can't handle on a stock crank. And wouldn't you know if it had a bad bearing? It would have play Quote Link to comment Share on other sites More sharing options...
Bennett131 Posted April 21, 2016 Report Share Posted April 21, 2016 Everybody keeps telling you what you need to do, but you wont listen. Ive spun cranks out of phase with bolt on mods and some added compression. How do you know what that crank can handle? Quote Link to comment Share on other sites More sharing options...
camp0429 Posted April 21, 2016 Report Share Posted April 21, 2016 Stock cranks will handle a shit load of power. If welded. Yours may be fine, maybe not. Think of how old that thing is and how many millions of times it's made a reveloution, shit wears out. Theres no telling unless it's actually inspected properly. Definatly not a chance I would be willing to take, especially since your only out a hundred bucks or so and a little more time Quote Link to comment Share on other sites More sharing options...
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