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5/16/2015
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karlz Added a reply to Roller bearings VS Ball bearings for Crank bearings
12/3/2020 1:28pm The roller bearing fitted makes the cases easier to split and and rebuild. You should not need a crankcase splitting tool.
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JMCR250 Liked a reply to forum topic Blown up cr125 bottom end question
10/28/2020 3:43am
On a two stroke, the lower end is sealed off from your transmission, so if you're finding pieces of metal in your transmission drain plug they are coming from your transmission or clutch OR you blew a hole in the case between where the crankshaft rotates and your transmission. You have significant enough damage to the cylinder/piston/ring that you should split the cases and check the crank, crank bearings and the integrity of the cases. At the same time, maybe you'll be able to find out what is causing the metal bits on your transmission oil plug. You'll need a...
This forum topic has 21 replies.
karlz Added a reply to Piston Size KTM SX 300
10/26/2020 10:53am Meteor pistons offer a 71.93mm piston. Part number is 2668. I no longer sell them, but the quality is good. karlzracing.com
karlz Added a reply to RM250 '10 Transmission tear down, assistance needed with parts
10/1/2020 12:38pm All the gears shown need replacing as well as any other gears they select in to. Regards the forks hard to say without actually measuring them. karlzracing
karlz Added a reply to Help identifying forks...
7/26/2020 1:02pm Early 47mm Showa twin chamber cr250.
karlz Added a reply to Wrist pin diameter
5/19/2020 1:13pm 19mm x 49mm
DynoDan22 Liked a reply to forum topic Who surfaces their shock piston?
5/19/2020 1:07pm
Surfacing the piston is more for removing and irregularities from the shims wearing the piston surface than machining defects. It's super easy to do. Just put a little grease down on a flat surface to keep the sand paper from moving around and lay the sand paper over the grease. Move the piston in figure eight patterns until the wear marks are gone. It doesn't take much.
This forum topic has 5 replies.
karlz Added a reply to WAY too stiff KYB sss forks - Drain oil inner/outer chamber?
5/16/2020 1:33pm Even if the bushings still have the Teflon coatings on them, but are rough texture and not silky smoothe the forks will bind. One of many many things I have learned in 30yrs servicing suspension.
karlz Added a reply to Kx125 piston help
3/8/2020 7:50am If the cylinder has had a steel liner fitted and been bored out to 54.50mm it will fit.
karlz Added a reply to 84-92 yz80 rear shock rebuild questions
11/9/2019 6:52am Yes you can use a needle or on some shocks it has a bolt head that the needle fits in the middle. If it has the bolt assy you can slowly unscrew and it will release the pressure, but having said that you will need the needle to refill anyway. It is also best to point away from face or...
karlz Added a reply to Yz125 piston and ring
11/8/2019 12:31pm You measure the gap when the ring is in the cylinder bore. Push it in the bore with the piston so it sits correct.
karlz Added a reply to Piston too low in cylinder?
10/16/2019 3:22pm Going off my daily experience of selling mx parts. It looks that a 1997-1998 rod has been fitted which is 5mm shorter.
Bruce372 Liked a reply to forum topic 2017 tc 125 cylinder wear *Pic Heavy*
8/14/2019 1:39pm
Pistons aren't round or straight so those measurements dont mean much
This forum topic has 16 replies.
karlz Added a reply to Rust removal works 2 stroke pipe.
7/31/2019 1:19pm Ive used Coca-Cola and a scotchbrite on light rust, it may work on deep rust.
karlz Added a reply to 1989 RMX250 help
6/25/2019 12:25pm Hope this answers the question. K=1989 L=1990 and so on. www.mx-parts.com
karlz Added a reply to KTM Non Linkage Rear Suspension
6/6/2019 8:00am The only advantages where easy to remove and install and saving time and money replacing linkage bearings. www.mx-parts.com
karlz Added a reply to Cr 125 piston size?
5/26/2019 12:26pm The last four numbers are 5450. Std bore is 54mm so you may have a steel liner fitted and been rebored 0.50mm oversize. www.mx-parts.com
karlz Added a reply to 2019 ktm 150sx shock question
5/8/2019 3:10pm After 7 hours it should be broke in, but not worn out. I have known WP shocks in the past do this. In my experience the piston rod nut comes loose, making the valving shims not clamp to the piston, which causes more oil flow. www.mx-parts.com
karlz Added a reply to Rm250 crank
4/1/2019 3:23pm The 1988 and 1990 are different, so I would think the 1989 is just for that year only. www.mx-parts.com
karlz Added a reply to Fork tool help YZ125 (please)
2/6/2019 6:51am If you are only changing the seals, the only other tool you need is for the fork cap. If you are changing the inner chamber oil you will need the fork cap inner tool, other than that no special tools for the job you are doing. www.mx-parts.com