Harleydavidson 248 Posted July 11, 2023 Rebuilding my rancher today low on compression and the combustion gasses are leaking past the rings it’s got a ton of blow by got a big bore kit for it 🤌 1 Share this post Link to post Share on other sites
Harleydavidson 248 Posted July 11, 2023 This is one heavy hunk of metal Share this post Link to post Share on other sites
Harleydavidson 248 Posted July 11, 2023 Engine is out and in the way to be takin apart theres a few spots on the cylinder where my nail will grab 22 years of service and finally it’s time for a rebuild Share this post Link to post Share on other sites
Harleydavidson 248 Posted July 11, 2023 Here’s the old and new cylinder old one looks like it has some cracks in the liner Share this post Link to post Share on other sites
Harleydavidson 248 Posted July 11, 2023 Got the top end on looks good compression went WAYYYYYY up I can’t barely pull it on the table 1 Share this post Link to post Share on other sites
Fishfiles 20,145 Posted July 11, 2023 The two biggest thing I think to watch out for when doing a top end , are , 1) how much play is in the wrist pin journal ( too much and the piston wobbles and will egg shape the bore "quickly " and 2) Is the bottom end cleaned out ? ( cause if it ain't , the slug grindings will shorten the life ) , either one of these steps over looked and the life span will be short lived So what is the piston diameter of that " Big Bore " Niche kit you got there , I looked and E-Bay and man they are cheap , can get a head with valves ready to go , new jug , piston , air filter , complete carb , oil filter , spark plug , gaskets , etc , etc , for a smidgen over $300 Share this post Link to post Share on other sites
Harleydavidson 248 Posted July 11, 2023 Everything is nice and tight and last night I tore everything apart down the the bearings cleaned it with diesel and put it back together it’s 352cc I believe and got valves springs and seals in it had the head professionally inspected and it looked good had the carbon cleaned off and it was shaved a bit got all new gaskets plug and carb for it gonna change the oil every heat cycle I think you are supposed to do that about 3 or 4 times everything I’ve done was about 220 might get a new head for 140 and that comes with everything in it cleaned the Frame for the first time ever probably cleanest it’s been in 20 years Share this post Link to post Share on other sites
jeepwm69 7,619 Posted July 11, 2023 Check the wrist pin to connecting rod for any play at all. Every 350 I've seen that needed a top end also needed a connecting rod. Edited to add, nevermind, left this thread pulled up for a few hours and you'd already gotten it back together by the time I responded. Share this post Link to post Share on other sites
Harleydavidson 248 Posted July 12, 2023 Best she’s ran since 2018 IMG_9658.MOV 2 Share this post Link to post Share on other sites
Harleydavidson 248 Posted July 12, 2023 I’m doing 4 heat cycles to be safe and this thing is a certified thumper it’s a lot louder and deeper sounding 1 Share this post Link to post Share on other sites
Harleydavidson 248 Posted July 12, 2023 Just got it all back together and took it on the first test drive and she runs like a dream Share this post Link to post Share on other sites
Harleydavidson 248 Posted July 13, 2023 Turns out y’all were right on the RTV the back piece on the case is leaking time for some jb weld 😭 Share this post Link to post Share on other sites
Harleydavidson 248 Posted July 14, 2023 Got gaskets for the engine time to put them in Share this post Link to post Share on other sites
Harleydavidson 248 Posted July 17, 2023 Got the oil leak fixed and low rpm valve noise but at higher rpm’s still sounds like it’s ticking valves are in spec and everything did I miss something or is this normal IMG_9867.MOV Share this post Link to post Share on other sites
Fishfiles 20,145 Posted July 17, 2023 1 hour ago, Harleydavidson said: Got the oil leak fixed and low rpm valve noise but at higher rpm’s still sounds like it’s ticking valves are in spec and everything did I miss something or is this normal IMG_9867.MOV It is telling me it is in my best interest to not download your video Share this post Link to post Share on other sites
Harleydavidson 248 Posted July 17, 2023 put it on YouTube for y’all 1 Share this post Link to post Share on other sites
Fishfiles 20,145 Posted July 18, 2023 I Dont hear nothing much. If you think it is noisey then readjust the valves and maybe try 1 thousand tighter then specs. Share this post Link to post Share on other sites
Harleydavidson 248 Posted July 18, 2023 Tightened it 1 thou tighter and the little noise it had is gone now i also put the boom tune on it and she does indeed go BOOM 1 Share this post Link to post Share on other sites
jeepwm69 7,619 Posted July 18, 2023 15 hours ago, Harleydavidson said: put it on YouTube for y’all You need to send that meter to akatv. Glad a valve adjustment got your tick quieted down. Share this post Link to post Share on other sites
