Instructions for the CRF450X kit are now available online HERE. Other kits are similar to install and the instructions are available on request.
Questions? Send an email to email@example.com for the fastest response.
Sorry everyone, I no longer have the CNC machine and had to shutdown SMD due to financial reasons. I apologize, but all of the remaining sub-frame kits have now been sold.
The website will come back up if I can find an alternate supplier, but I don't have an ETA on that right now. If anyone is interested in taking over this product, all of the 3d files for Honda CRF motorcycles, toolpaths (source files and g-code), and manufacturing fixtures are available for you to run a turnkey operation with a Haas mill.
Thanks to everyone who purchased a subframe kit from my little website and a big thanks to everyone who spread the word about the product. I originally designed the subframe kit for my wife, and she is still riding her CRF250R with the original prototype. It makes me happy to think about the hundreds of satisfied customers (WORLD WIDE!!) who are comfortably riding a full size bike as a result of this kit.
Regards, James Davis - Design Engineer
Q: Can I purchase a lowering kit without signing up for a PayPal account?
A: A PayPal account is not required. You will see instructions for using a credit card without a PayPal account on the bottom left side of the checkout page.
Q: How much is shipping? Do you ship internationally?
A: All orders are shipped via USPS Priority Mail service. Shipping within the USA is $5.00 for 2-3 day service. USPS Express Mail service is available on the checkout page for an additional charge. All international orders are shipped via USPS Priority Mail International. Enter your address in the checkout page to determine international shipping charges. Note: International buyers are responsible for ALL local taxes or customs charges that may be imposed by your country of destination.
Q: Do you have a kit for the 2007 or 2008 CRF450R?
A: Sorry, but Honda radically changed the subframe and exhaust placement in 2007. Our sub-frame lowering method is not compatible with the 2007 or 2008 subframes. If you have a 2007 or 2008 CRF450R, you can purchase a used 2006 CRF450R subframe and exhaust, then use our 2006 CRF450R lowering kit.
Q: Do you have a kit for the 2009 CRF450R?
A: Honda completely redesigned the CRF450R for 2009 - we have not yet determined if a lowering kit will be available for the 2009 model.
Q: How much is my seat lowered?
A: The sub frame kit lowers the seat by lowering the rear seat mount position. Seat height of most models are lowered approximately 1.5" measured at the seat attachment bolt. Because the sub frame pivot is at the rear of the tank, the seat/tank junction angle and height is unchanged.
Q: Do you have instructions on-line?
A: We are converting our instructions to PDF and will have them available soon for free download.
Q:Do I have to cut my sub frame? Am I going to make a mistake?
A: Yes, the end links are designed to fit inside of the sub frame tubes. Detailed instructions for marking and cutting the sub frame are included. Although we recommend careful workmanship, the kits have been installed by riders with little mechanical skill.
NEW OPTION! If you are uncomfortable installing the product yourself, you can send us your sub frame and we will professionally install the end links and exhaust mount modifications for you. Contact us for details and mailing requirements - automatic ordering of this option will be available soon!
Q: I have trouble touching the ground and starting my bike. How will this help me?
A: By lowering the rear portion of the seat, the kit makes it easier to swing a leg over the bike. Because the seat normally angles back up after the seat/tank intersection, the kit will make it easier to touch the ground while starting. The lower rear height also helps with the peg transition and rear weight positioning for shorter riders.
Q: I need more clearance. Can I cut my seat?
A: Trimming the seat foam is an inexpensive way to reduce the seat height by about one inch. Unfortunately, newer motocross bikes do not have much seat foam at the rear of the seat, so cutting the foam results in a "dished" seat where you sit in the trough and have a steep angle up onto the tank and rear of the seat. The sub frame lowering kit helps correct the geometry of a cut seat by lowering the rear portion of the seat so that it becomes flat again. If the lowering kit does not shorten your bike enough, we recommend trimming the seat foam along with the lowering kit installation to provide a comfortable, yet lowered ride.
Q: Can I cut the sub frame shorter in order to lower the seat more?
A: The amounts to cut from the sub frame have been carefully tailored to each bike to provide the maximum amount of lowering without tire rubbing or noticeable rearward seat angle. If you need more lowering, you can obtain excellent results by trimming the seat foam in conjunction with the kit. It is possible to remove additional length from the sub frame, but you will experience tire rubbing, rearward seat angle, and difficulty attaching the exhaust. We do not recommend removing additional material from the subframe.
Q: I have REALLY short legs and have to ride a mini-bike. Is there any hope?
A: Yes - although it is not cheap. Contact a suspension shop and ask for a supermoto setup. They will be able to modify your front and rear shocks to reduce suspension height at the expense of suspension travel. Our sub frame kit will complement this lowered height. With a supermoto suspension, a trimmed seat and the sub frame kit, one of our CRF250R's is so short, it is often mistaken for a CRF230F!
Q: What is included in the kit?
A: The lowering kit includes two precision machined sub frame end links, complete instructions and hardware, air box mud flap relocation bracket, and an exhaust relocation bracket (if required).
Q:Can I just have a local welding shop shorten my sub frame?
A: No, aluminum is much more sensitive to heat than steel. The stock sub frames are carefully welded and heat treated to ensure they will not become brittle and crack. Welding an aluminum sub frame can be dangerous; we do NOT recommend welding the sub frame.