Installing the Hardtail Kit (SR400/500): Parts Diagram and Brake Rod Extension
Installation steps for the Hardtail Kit for the SR400/500. Photos and parts diagrams walk you through the parts for the lower (left and right) and upper mounts, extending the brake rod, and fitting the frame caps.
- Bolt and collar combinations for the lower and upper mounts
- How to connect the brake rod extension bracket
- Changes needed on the bike after installation, and precautions
The Hardtail Kit replaces the swingarm on the SR400/500 to make the rear rigid (no suspension). The parts used on the left and right differ in size and type, so pay close attention to which go where.
Based on the photos and parts diagrams in the original, this page covers securing the frame, extending the brake rod, and fitting the caps, along with important precautions.
01 Hardtail section: lower / left side
Parts used (Size and type are important, so pay attention)
- ① 9mm plate
- ② Frame collar (short)
- ③ M12-65mm bolt
- ④ Spacer (long)
- ⑤ M10-45mm bolt
Insert the "short frame collar" from the [outside toward the inside].
02 Hardtail section: lower / right side
Parts used (Size and type are important, so pay attention)
- ① 9mm plate
- ② Frame collar (long)
- ③ M12-70mm bolt
- ④ Spacer (short)
- ⑤ M10-40mm bolt
Insert the "short frame collar" from the [outside toward the inside]. (As written in the original)
03 Hardtail section: upper / both sides
Parts used (Size and type are important, so pay attention)
- ① 6mm plate
- ② Collar
- ③ M10-25mm bolt
Place the stock 14mm washer between the 6mm plate and the frame side.
04 Brake rod extension
Parts used
- ① Small 6mm plate
- ② Clevis pin
- ③ Cotter pin
Connect the included extension bracket to the existing rod. Don't forget the cotter pins.
05 Fitting the caps
Fit the included frame caps into the holes left by removing the swingarm.
Parts used: ① Frame cap x 2
06 Precautions
- The stock rear fender, taillight, turn signals, and similar parts can no longer be fitted, so modify and install universal parts or similar to suit your bike.
- The stock side stand will make the bike stand too upright, so modify or replace it to suit the bike.
- The footpegs lose their rubber mounts and become solid-mounted. The left footpeg is offset 9mm outward, so the stock rear-set footpeg can't be used as-is. Either modify it to fit or switch to forward-type footpegs.
- If the stock frame has weld spatter, scratches or excessively thick paint, the collars at the footpeg mounts may be difficult to insert. In that case, file them down, etc.
- If the engine has been bored out or tuned with a racing carburetor or similar, we recommend upgrading the chain size (520, 530) and adjusting the final drive ratio with sprockets.
Because this product removes the suspension, vibration increases. Inspect and retighten everything before every ride. If you are unsure about the installation, be sure to have it done by someone experienced or by a custom shop. For any questions, please reach us through our contact form.
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*Installation is at your own risk. If you're unsure about doing the work yourself, we recommend consulting your local motorcycle shop.
*The content and photos reflect the time of writing. Please check each product page for current specifications, fitment and stock.