1340 EVO Adj Pushrod hitting the cover
Road Captain
Joined: Apr 2009
Posts: 501
Likes: 150
From: Jersey
93 Mooglide, I've been researching this topic as I'm about to replace my lifters and pushrods. Had a slightly bent sneakable pushrod and Kinglide was generous enough to give me a replacement to get me through the riding season. Now that the weather has gone to crap it's time to do the work. I went with S+S quickie pushrods and Hylift Johnson lifters, replacing a set of Jims lifters with 50k on them and a goofy collection of 3 different brands of pushrods. I also have Screaming Eagle heads and and SE 57 cam, SE/Jims roller rockers which supposedly offer better geometry. What I found interesting is in the instructions that came with the S+S pushrods it includes a diagram that tells you how much to CUT OFF the bottom of the inner push rod tube to PREVENT interference between the pushrod and inner tube. My rear exhaust and front exhaust have always had a very minor bit of rubbing, none of the other brands of pushrods I've used have ever recommended trimming the inner tube. Going to do this trimming when I install the new lifters and pushrods, maybe it would help your noise too.
Thread Starter
|
Novice
Joined: Aug 2018
Posts: 16
Likes: 4
From: Ohio
Bentparts, Thank you for the info. Sounds like you've put a lot of work into the motor. I'm running pretty much stock with an EV27 cam, HD "B" lifters, upgraded exhaust, air cleaner and carb re-jet. Nothing fancy, but it makes me smile when I twist the throttle... If my front exhaust pushrod ticking reappears I may give modifying the pushrod cover a go, but after the last "readjustment" of the cover it's still quiet. I admit it's an "iffy" fix, but so far it's working. Good luck on your upgrades. I'd appreciate it if you'd let me know if the recommended pushrod cover modification by S&S solves the interference problem.
HDF Community Team
Joined: Jun 2006
Posts: 12,776
Likes: 2,607
From: san antonio
Back in the day, boring the top and bottom of the pushrod tubes to eliminate the crimped shoulder that reduces the ID of the tube at the top and bottom was done to provide more room a those two points of the pushrod travel to eliminate contact between the pushrod and tube. Findind a machine shop to do the boring is cheap and quick as DIY fixes usually resulted in trashed tubes or injury. However, I did see one DIY approach used that made some sense. The guy used uni bits in a hand drill at low rpms and reamed out the crimped area. Understanding the pushrods have to be removed for the DIY fix, replacing with OEM hardware or a custom set of fixed length pushrods would be the better way to go.
Stellar HDF Member
Joined: Mar 2012
Posts: 2,019
Likes: 599
From: Columbus, OH
Attachment 619422
Attachment 619423
I did my twin cam tubes with a 5/8" reamer I use for truck frame work in a drill press
Just went slow and let the tool do the work
Don't know what size you would need for an evo, but this style reamer comes in many sizes
Attachment 619423
I did my twin cam tubes with a 5/8" reamer I use for truck frame work in a drill press
Just went slow and let the tool do the work
Don't know what size you would need for an evo, but this style reamer comes in many sizes
HDF Community Team
Joined: Jun 2006
Posts: 12,776
Likes: 2,607
From: san antonio
Originally Posted by Fat11Lo
I did my twin cam tubes with a 5/8" reamer I use for truck frame work in a drill press. Just went slow and let the tool do the work. Don't know what size you would need for an evo, but this style reamer comes in many sizes
Stellar HDF Member
Joined: Mar 2012
Posts: 2,019
Likes: 599
From: Columbus, OH
with the drill press I just used my left hand to hold the tube
square the deck before starting
slow and steady pressure let the reamer do the work, it will get warm take breaks to let it cool
The unibit scares the hell out of me seems like it would want to catch easy, this type of reamer makes better contact and the taper is gradual, see how smooth the finished tube is compared to one of the previous pics
square the deck before starting
slow and steady pressure let the reamer do the work, it will get warm take breaks to let it cool
The unibit scares the hell out of me seems like it would want to catch easy, this type of reamer makes better contact and the taper is gradual, see how smooth the finished tube is compared to one of the previous pics
HDF Community Team
Joined: Jun 2006
Posts: 12,776
Likes: 2,607
From: san antonio
with the drill press I just used my left hand to hold the tube, square the deck before starting. slow and steady pressure let the reamer do the work, it will get warm take breaks to let it cool
The unibit scares the hell out of me seems like it would want to catch easy, this type of reamer makes better contact and the taper is gradual, see how smooth the finished tube is compared to one of the previous pics
The unibit scares the hell out of me seems like it would want to catch easy, this type of reamer makes better contact and the taper is gradual, see how smooth the finished tube is compared to one of the previous pics
Last edited by djl; Nov 8, 2018 at 10:28 AM.
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Verdad Gallardo
8 Best Harley-Davidson Motorcycles Ever
Pouria Savadkouei
10 Worst Harley-Davidson Motorcycles Ever
Pouria Savadkouei
Killer Custom's Jail Break Is The Breakout That Refused to Blend In
Verdad Gallardo
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Verdad Gallardo
Harley-Davidson Reveals Super Cool Cafe Racer Concept
Verdad Gallardo
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Verdad Gallardo
10 Motorcycles You Should Never Buy
Joe Kucinski
10 Things Harley-Davidson Needs to Fix in 2026
Verdad Gallardo
Stellar HDF Member
Joined: Mar 2012
Posts: 2,019
Likes: 599
From: Columbus, OH
Split some hose and put your drill in the vise then just work the tube a little at a time, that's if your drill has a trigger lock
Last edited by Fat11Lo; Nov 8, 2018 at 03:40 PM.
HDF Community Team
Joined: Jun 2006
Posts: 12,776
Likes: 2,607
From: san antonio
Thread
Thread Starter
Forum
Replies
Last Post
DTDK
General Harley Davidson Chat
37
Feb 23, 2012 06:26 PM