Lowbrow Customs Triumph Unit 650 cc Bolt-On Hardtail install easily by bolting on to your stock Triumph front frame section perfectly. These hardtails fit Triumph 650 unit motorcycles from 1963-1970 and are made right here in Cleveland, Ohio USA. With a 4 inch stretch and a 2 inch drop, these hardtails are the perfect solution for your next chopper / bobber project. Though installation can be a simple, we thought it would be a great idea to share how easy it really can be and install one on Todd's latest project. If you have a Harley Davidson, check out our posts on how we install hardtail frame on the Sportster with ease.
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The Stock Triumph frame.
Step 1 - Jack your bike up with a scissor lift and or floor jack to get your rear wheel off the ground.
Make sure to use a jack to get your rear wheel off the ground.
Step 2 - Remove the chain, brake rod, brake stay and rear wheel.
Remove the axel.
Remove the brake rod.
Remove the rear wheel.
Step 3 - Remove the shocks from the rear stock frame and swing arm.
Remove the rear shocks from the swing arm.
Remove the shocks from the rear frame section.
Remove the shocks.
Step 4 - Remove the rear fender to make more room and easier access to the frame bolts.
Remove the rear fender.
Step 5 - Remove the swing arm. *Note, there is a lock tab that needs bent up in order to remove the nut on the left side of the swing arm. After the lock tab has been bent up you can remove the left nut. Next remove the long bolt through the swing arm located on the right side. The swing arm should be able to be removed from the frame, you may have to carefully pry the swing arm from the frame mount depending on its fitment.
Bend the lock tab up on the swing arm nut.
Remove the nut on left side of swing arm
Remove the right side long bolt that goes through the swing arm.
Remove the right side long bolt completely.
Carefully pry the swing arm from the frame if you need to.
Remove the swing arm from the frame
Step 6 - Remove the rear frame section from the bike. There are 5 bolts to remove, one on the top of the frame and then two on the right and left bottom sections located near the rear down tube. It’s easier to start on the bottom bolts and work your way to the top.
Start with the four bottom bolts that attach the two halves of the frame together.
Remove all 4 bolts on the bottom section where the two halves of the frame meet.
Remove the top bolt from where the two halves of the frame meet.
See ya later stock rear section!
Step 7 - Install your new Lowbrow Customs Triumph Bolt on hardtail utilizing the same 5 mounting points you just removed the bolts from on the stock rear section. It is easier to loosely install the bolt on the top first. Two of the bottom bolts are threaded into the original front loop, make sure they are lined up correctly and threading nicely before tightening. Start all 4 bottom bolts before fully tightening down. *Note, the hardtail mounting tabs are thinner than the stock rear section and you will need to acquire shorter bolts for a correct fit.
Hello Lowbrow Customs Triumph Bolt-On Hardtail!
We found it easier to start at the top single bolt on and then work down to the bottom four bolts
Having the top bolt secured loosely allows to push the bottom section on easier and line up the holes evenly with out having to fumbling around.
Install all 4 bolts on the bottom section of the frame.
Securely tighten all 5 bolt locations.
Securely tighten all 5 bolt locations.
With the motor in the front loop and the rear wheel in the new hardtail, re-install your chain and be sure to check the front to rear sprocket alignment. Now would be a good time to mock up your rear fender and figure out where your mounting points will be. Most customers using hardtail sections will also changing the following parts, oil tank, seat, battery location, fender struts or sissybar, tail light and license plate mount.
Re-install your rear wheel to make sure for chain clearance.
Lowbrow Customs stamp of approval.
Boom! Hardtail complete.