|
Enduro Engine - 2 stroke Cylinder, Piston, Tranny, Bearings, Clutch, Pipes & Silencers, etc. |
|
Thread Tools | Display Modes |
#1
|
|||
|
|||
How much crank play in a 99 is OK?
How much play of the crank (axial and radial) is acceptable with a 99 200 motor? Is it different with the 06 motors? The 99 200 motor of my son's bike has a lot of play in and out and my 06 300 has none. Are there differences with the bearings that account for the differences?
I'm getting a lot more vibration from the 200 than it had previously so I think I'm going to have to split the cases anyway to find out what is wrong. Thanks
__________________
11 Husaberg 570 12 Husky 310 97 Gas Gas JTX 270 trials 10 Beta Evo 290 trials 02 E440 Cannondale plated |
#2
|
|||
|
|||
I usually check the connecting rod by this simple method:
1. Pull the cylinder and put the motor at top dead center. 2. Hold the rod at the base right above the crank halves and see if there is any up and down play at all. If you can feel play, it's toast. I don't worry too much about side to side play. It is the up and down that means it is worn out. Cooksey Crank in Texas will do a fantastic job of rebuilding your crank. I can vouch for Andrew's work. We were college roommates in engineering school. He is very talented.
__________________
Mike 2011 300 Nambotin Replica 2001 Gas Gas 321 Trials bike 2010 BMW F800GS |
#3
|
||||
|
||||
Quote:
Now, I don't have a whole lot of experience with the older engines but from what I read they used a 2 piece roller on the stator side which always had a bit of clearance/play detectable. I can't recall which way or how much was acceptable, but I think that up to the 07 models they used the same design. I think you may have answered your own question though. A 99 model is getting on some. A 200 usually works harder than a 300, and the excess vibes is also saying something. Might be rebuild time. |
#4
|
||||
|
||||
Up and down > Bad
In and out > Not so bad.
__________________
www.endurohp.eng.br Sherco ST300 2015 (Trials) https://www.instagram.com/leocm74/ Brasil! |
#5
|
|||
|
|||
Thanks for the help. I'll pull off the stator cover and see how much up and down. This bike had the bottom end rebuilt before and it seemed pretty solid up until the last time I started it up. Maybe there is something else that came loose ( I can hope!), but if I don't find anything I'll pull the motor.
__________________
11 Husaberg 570 12 Husky 310 97 Gas Gas JTX 270 trials 10 Beta Evo 290 trials 02 E440 Cannondale plated |
#6
|
|||
|
|||
Another question about crank play - has anyone added shims to tighten it up a bit on these older motors? I measured about .045 in side to side. If I added a .020 or .025 shim it would reduce the side to side movement.
Thanks
__________________
11 Husaberg 570 12 Husky 310 97 Gas Gas JTX 270 trials 10 Beta Evo 290 trials 02 E440 Cannondale plated |
#7
|
||||
|
||||
Personally, I wouldn't shim it. If it's worn out, it's worn out...or not.
__________________
All healed up, and ready to burn some fat. |
#8
|
|||
|
|||
I should mention the measurement is with brand new bearings installed in the case halves (with the case halves split) vs the width of the crank. Nothing is worn - this is just the amount of play it has as manufactured. It just seems loose to me based on other motors I've rebuilt. I figured since I'm going to re-assemble the bottom end I could buy or make a shim.
__________________
11 Husaberg 570 12 Husky 310 97 Gas Gas JTX 270 trials 10 Beta Evo 290 trials 02 E440 Cannondale plated |
#9
|
|||
|
|||
Decided to buy some shims and a new bearing
I decided to add some shims behind one of the bearings. McMaster has 68 mm OD x 55 mm ID shims. I ordered some and I'll install one behind one of the bearings and cut down the slop by at least 1/2. I'll trash a bearing doing it, but I don't like how much it slops back and forth. Bearings are not that much, although it's not as easy to find the Koyo 63/28's.
__________________
11 Husaberg 570 12 Husky 310 97 Gas Gas JTX 270 trials 10 Beta Evo 290 trials 02 E440 Cannondale plated |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Crank Remover and Crank Installer tools for EC250 | Fabry | Enduro Engine - 2 stroke | 5 | 06-25-2013 07:24 PM |
Crank end play | CDBiker220 | Enduro Engine - 2 stroke | 12 | 02-13-2011 05:22 PM |
Little play in the snow in UK. | Todd5774 | Ride Reports | 5 | 01-07-2010 11:55 AM |
Rod bearing play??? | moto9 | General Discussions & Announcements | 7 | 12-21-2009 07:52 PM |
Play riding with JW | Berkyboy | Pictures & Videos | 1 | 06-15-2009 04:00 PM |