Jump to content
Sign in to follow this  

Homemade Flywheel Holder Tool


They say necessity is the mother of all invention, I agree. I decided to build this flywheel holder because I am unemployed and dont have the money to be throwing around on over priced tools. The other methods some of you may use to remove the crankshaft nut did not work for me. I tried an impact wrench, oil strap, and putting it in gear while holding the brake down. I also did not like the idea of the jamming something in the clutch basket method. If you have also tried these methods and had no luck than building this tool is the way to go. Its like the saying " The right tool for the right job" and this is one case where it where it applies extremely well.

I built this flywheel holder for about $5.50. I have seen this sort of tool go for $30+ dollars online. The price for you will vary by a dollar or so depending on what you already have laying around. I already had some nuts and bolts around so I only needed the steel bar and 4 nuts.

I built this for a 06 YZ250F so you may need to change the bolt size according to you bike. For my bike a 5/16 bolt fit perfectly. I think this tool is simple enough to build for anyone just by looking at the pictures but i will try to detail what i did in each step.

Parts List

3/16 x 3/4 x 3ft steel strip

two 5/16 x 1 1/2" bolts

four 5/16 nuts

one 3/16 x 3/4" bolt

one 3/16 nut

one washer


First, cut the steel strip into one 14" strip and one 6 1/2" strip. You can use a hacksaw, a cutoff wheel, or what ever else you have that can cut steel.


Second, drill a hole using a 5/16(or what every size you need for your bike) drill bit into one end of each steel strip. I used a drill press for this step. If you dont have one a hand drill should work just fine but you will have to work a little more. Put a piece of scrap wood under the steel strip so as not to drill into you work surface.


Next, lay the smaller piece of steel strip on the larger strip with the two 5/16 hole aligned. Place one of the 5/16 bolts through both of the holes to secure the strips for the next step. Both strips should be parallel and squared to each other. Now drill a hole at the other end of the small piece straight threw both pieces. Use a 3/16 drill bit for this step. This hole will be for the pivot screw. You may want to clean up the drill holes and cut ends strip for sharp spots using a file. Place the 3/16 bolt with a washer through the pivot hole and secure it with the nut on the other side.

flywheelholdertool004.jpg flywheelholdertool005.jpg flywheelholdertool006.jpg

Take the two 5/16 bolts and thread a nut to the end of each bolt. The purpose of two nuts on each bolt is to secure the bolt into the tool and to adjust the depth of the bolts into the flywheel.


Now place each bolt into the 5/16 hole and secure it with a nut. Thats it, your done. Simple eh.

flywheelholdertool008.jpg flywheelholdertool009.jpg flywheelholdertool010.jpg flywheelholdertool011.th.jpg flywheelholdertool012.jpg

Sign in to follow this  

User Feedback

Recommended Comments

There are no comments to display.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Reply with:

  • Similar Content

    • By Bobby Iverson
      Was riding my 450, testing out a new speedometer, shifted into 2nd, moved a couple feet and heard a loud crack noise from engine area. Will not turn over, sounds like its jammed or seized from moving. My guess is tat the timing chain just exploded and fouled everything up. Haven't found time to open it up. Thought I'd go to forums to get some opinions on what to look at first. As far as back round info: Engine was opened up to replace some gaskets. replaced my valves and adjusted rockers to .05mm. Timing chain taken apart a couple times. Shifts through gears fine even though it doesn't run. I am not very fond of ktms or dirt bikes in general but fairly mechanically inclined. I don't know what to do so here I am on the forums. Any help or advice is much appreciated. Thank you.
    • By KG FILMS
      HI. So i am in the process of putting new studs on the cylinder in my 2001 CR80r!  I am just wondering if i need to torque the studs if so what is the torque spec?
    • By Wombat221
      hey guys ive had my drz for about a year and recently the little hole on the left side of the engine has started leaking what looks like oil, ive read it could be a head gasket or something failing but I have no other leaks and the bike still runs fine.
      can someone please tell me what this hole is for and why its started leaking recently.  thank you

    • By Dustin Kraus
      So having a little issue with my 05 RMZ 450. Just recently did a top end fresh in up on my 450 and now it seems very sluggish and boggs in the low end.It does not have the snap it had before the build. The top end feels great lots of snap and power. So not sure if I have to get the carb tuned or it's something I'm overlooking on my first rebuild. Only got maybe 1 or 2hrs on the build. Any help would be appreciated thanks
    • By Scott Meshey 141
      Twisted Development began with a passion to build and develop the best performance products and services for the racing community. We pride ourselves in putting together the best performance packages that will fit your specific needs. Whether you are a beginner, intermediate or a top professional who needs the technical edge to compete at the highest level, we have a service or package for you.
      Check out Twisted Development's website for all of their services!