Case bearings - Suzuki Z400 Forum : Z400 Forums
Reply
 
LinkBack Thread Tools
post #1 of 17 (permalink) Old 10-06-2019, 04:38 PM Thread Starter
:::Rookie Rider:::
 
03z400-98's Avatar
 
Join Date: Oct 2019
Posts: 11
Case bearings

03 z400... Been rode hard and put up dry before I got it... needle bearings went out on the pin for the rod... I have it apart and I cleaned all bearings inside the case.. (I’ve rebuilt straight drive transmissions, prior job, & have reused many many bearings..) that being said We’ve never changed any bearings unless they were completely shot... so one of my questions is.. does anyone know where to get all the bearings? Or does the other bearings ever “go out or go bad”.. seems like all the main concerns is for the crank itself.. I have cleaned them and they roll great, all besides the two that are completely inside the case. (Not open, closed inside the case on one side.) not sure what exactly they are... ones at the clutch lever, other is what the primary trans rolls on I guess.. has anyone ever changed them? Or had any go out? I just got any to make sure after I rebuild this I won’t have to go back through it again just for forgetting something minor that turns major.. any other tips are welcomed. Only mods (that I can tell) is a cp piston and hot cams cams (intake & exhaust) everything else is stock besides a 400ex carb and throttle (stock airbox and boot)
03z400-98 is offline  
Sponsored Links
Advertisement
 
post #2 of 17 (permalink) Old 10-06-2019, 04:52 PM Thread Starter
:::Rookie Rider:::
 
03z400-98's Avatar
 
Join Date: Oct 2019
Posts: 11
Another thing... I tried to “make shift” take the clutch basket off and dented the top (right side) of the bottom cases.. in between the piston and timing chain side.. does this matter? It’s not deep deep and they don’t go all the way across? Thought I could prob put light rtv at the Dents and the gasket down and it’d be okay? Ps.. the gasket and jug covers it too & sits on top
03z400-98 is offline  
post #3 of 17 (permalink) Old 10-07-2019, 10:14 PM
:::Official Spammer:::
 
amcf18's Avatar
 
Join Date: Apr 2010
Location: Quartzsite Az,/ Picton, On
Posts: 3,327
Garage
I would only be concerned with the crank bearings as well. Could you take a pic of the dent? I think you could get away with jb weld or possibly silicon inthe area as its low pressure.

2007 LTZ 400.. 94mm J&E piston, +4mm hotrods crank, 536webb cams,wiseco valves, 39mm fcr, tokyo mods throttle spring, honda thumb throttle,spring removed. yoshimura full exhaust, honda 400ex intake tube, no air box

Last edited by amcf18; 10-07-2019 at 10:20 PM.
amcf18 is offline  
 
post #4 of 17 (permalink) Old 10-08-2019, 11:09 AM Thread Starter
:::Rookie Rider:::
 
03z400-98's Avatar
 
Join Date: Oct 2019
Posts: 11
These are the “knicks” on the timing chain side
Attached Thumbnails
Click image for larger version

Name:	D9EEB721-4B8E-405D-9172-17B47359079E_1570547190420.jpg
Views:	7
Size:	7.8 KB
ID:	46633   Click image for larger version

Name:	02AF9B47-9F0B-4238-B851-CAFE371EE951_1570547285924.jpg
Views:	5
Size:	7.5 KB
ID:	46635  
03z400-98 is offline  
post #5 of 17 (permalink) Old 10-08-2019, 12:02 PM
:::Official Spammer:::
 
jetmech25's Avatar
 
Join Date: Apr 2012
Location: San Diego, CA
Posts: 3,974
Just use a light coat of black rtv on both sides of the gasket and it’ll be fine. Fully-vented case, so there’s no pressure to speak of.

I’d only be concerned with the crank and counter balance bearings, but these guys make a full kit if you need it:

Boss bearing, from EBay
Bottom End Engine Bearing Seal for Suzuki LT-Z400 LTZ400 2003-2008, $129

'05 Z
94mm bbk, +4 stroker, Hot Cams, Vertex piston, FMF Power Bomb header and Power Core can, KW black diamond valves/dual springs, FCR39, K&N, Elka long-travel LT fronts and rear, Houser +3, +3/4 LT A-arms, American Star pro xs chromoly tie rods, Dyna non-programable, Tusk +3 axle.

Last edited by jetmech25; 10-08-2019 at 12:14 PM.
jetmech25 is online now  
post #6 of 17 (permalink) Old 10-08-2019, 12:56 PM Thread Starter
:::Rookie Rider:::
 
03z400-98's Avatar
 
Join Date: Oct 2019
Posts: 11
Will the blue rtv be fine? Done a water pump on my truck and have a whole tube left... And what do you mean both sides of the gasket? Like top & bottom, around the piston? Or should I go lightly around the whole base?.. I’ve rebuilt tons of (straight drive) transmissions in the past and have done gasket work & have shaven ends on a trans case bc of nicks... even thought I might be able to do it with this but that cuts my valve to piston clearance and so on so would rather not do that. But if there’s really no “bad” can come from this then just light rtv or just a gasket I’m fine with that
03z400-98 is offline  
post #7 of 17 (permalink) Old 10-08-2019, 12:59 PM Thread Starter
:::Rookie Rider:::
 
03z400-98's Avatar
 
Join Date: Oct 2019
Posts: 11
I cleaned all bearings... the crank bearings are smooth! Hit with air and it spins freely for a minute, the balancer I have had moving freely but only locks up every now & then. (Not lock up completely, just dirt/metal something sticking every now then) there was metal shavings in the case from my shift stopper and I got that ordered. But for the most part bearing is free just sticks for a slight second every now and then, but when going continuously, it’s completely fine. Don’t think it would be a issue.
03z400-98 is offline  
post #8 of 17 (permalink) Old 10-08-2019, 02:06 PM
:::Official Spammer:::
 
jetmech25's Avatar
 
Join Date: Apr 2012
Location: San Diego, CA
Posts: 3,974
I’d coat the entire base gasket, just try not to leave a lot of excess that will squeeze out when bolted down. Ultra black is best, but plain black rtv is oil resistant. Not sure about blue. Not a terribly sensitive area like a transmission pan on a car or something.

I actually used rubbing alcohol to clean out all of mine during a rebuild. Just get as much out of the case as you can and give it time to dry. Pre-lube with some oil afterward, if possible.

'05 Z
94mm bbk, +4 stroker, Hot Cams, Vertex piston, FMF Power Bomb header and Power Core can, KW black diamond valves/dual springs, FCR39, K&N, Elka long-travel LT fronts and rear, Houser +3, +3/4 LT A-arms, American Star pro xs chromoly tie rods, Dyna non-programable, Tusk +3 axle.

Last edited by jetmech25; 10-08-2019 at 02:08 PM.
jetmech25 is online now  
post #9 of 17 (permalink) Old 10-09-2019, 08:59 PM Thread Starter
:::Rookie Rider:::
 
03z400-98's Avatar
 
Join Date: Oct 2019
Posts: 11
Just on the base to the case? Or case base and the bottom of the jug too? What about the case itself, rtv too? Or is there something else you’re supposed to use? I would honestly probably prefer rtv if I get the right stuff
03z400-98 is offline  
post #10 of 17 (permalink) Old 10-09-2019, 09:17 PM
:::Official Spammer:::
 
jetmech25's Avatar
 
Join Date: Apr 2012
Location: San Diego, CA
Posts: 3,974
I put the actual head gasket on dry, since that’s what the manual calls for. Everything else, including the base gasket, side cover gaskets, and even the case halves themselves; I use ultra black rtv. It’s highly oil resistant and sticky. If you order Suzukabond from a dealer, it’s pretty much the same stuff and it’s what the factory uses. I had gouges much like yours on the top of the case and never had a leak.

Yeah, just put a thin coat on the top and bottom of the base gasket, not on the actual engine parts. It takes very little. Anything more than looking like you painted the gasket black will just squeeze out, break off, and be floating around in the oil.

'05 Z
94mm bbk, +4 stroker, Hot Cams, Vertex piston, FMF Power Bomb header and Power Core can, KW black diamond valves/dual springs, FCR39, K&N, Elka long-travel LT fronts and rear, Houser +3, +3/4 LT A-arms, American Star pro xs chromoly tie rods, Dyna non-programable, Tusk +3 axle.

Last edited by jetmech25; 10-09-2019 at 09:20 PM.
jetmech25 is online now  
post #11 of 17 (permalink) Old 10-09-2019, 09:46 PM Thread Starter
:::Rookie Rider:::
 
03z400-98's Avatar
 
Join Date: Oct 2019
Posts: 11
Yes I’ll def be putting the head on clean&dry... but case halves and what about the metal gaskets? You still use them on the bottom end with the rtv? Both sides or just the bottom where the nicks are? On vacation have to talk when I dock at Florida
03z400-98 is offline  
post #12 of 17 (permalink) Old 10-09-2019, 11:35 PM
:::Official Spammer:::
 
jetmech25's Avatar
 
Join Date: Apr 2012
Location: San Diego, CA
Posts: 3,974
Ohhhh, I got ya. The base gasket comes in 3 layers. Most of us only use one of the 3 layers, either the top or bottom one. This drops the cylinder down a little, making the combustion chamber smaller, and raising the compression ratio. Valve-to-piston clearance doesnít become an issue unless you have a stroker crank and a high-comp piston combination.

So, cut the gold rivets out of the gasket by removing just enough material to get the rivet out and seperate them. Thinly coat one of the outer layers with ultra black rtv and install it.

'05 Z
94mm bbk, +4 stroker, Hot Cams, Vertex piston, FMF Power Bomb header and Power Core can, KW black diamond valves/dual springs, FCR39, K&N, Elka long-travel LT fronts and rear, Houser +3, +3/4 LT A-arms, American Star pro xs chromoly tie rods, Dyna non-programable, Tusk +3 axle.
jetmech25 is online now  
post #13 of 17 (permalink) Old 10-12-2019, 10:43 PM Thread Starter
:::Rookie Rider:::
 
03z400-98's Avatar
 
Join Date: Oct 2019
Posts: 11
So when I do use only one of the base gasket(s), should I rtv the bottom side at those nicks? Or should I do the top side or both? Or does any of that even matter
03z400-98 is offline  
post #14 of 17 (permalink) Old 10-12-2019, 10:54 PM Thread Starter
:::Rookie Rider:::
 
03z400-98's Avatar
 
Join Date: Oct 2019
Posts: 11
One last thing, while on gaskets,... would you even fool with buying the gaskets or a gasket kit? Or just use the ultra black rtv for it all (sides, cases, etc..) besides the layered gaskets.. for the base and jug..?
03z400-98 is offline  
post #15 of 17 (permalink) Old 10-12-2019, 11:11 PM Thread Starter
:::Rookie Rider:::
 
03z400-98's Avatar
 
Join Date: Oct 2019
Posts: 11
& with the gasket set up, what about running stock with a CP piston? Will it clear or hit the valves with the single layer ? & I’ve read a lot on the base gasket deal.. which is best, running the single layer? (I think) or taking the middle layer out and running the 2?
03z400-98 is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Suzuki Z400 Forum : Z400 Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome