by Alphacarina » Sat Jul 31, 2010 5:41 pm
I built my enclosed motorcycle trailer on a HF 1740 frame. The trailer is 4 X 6 with a 24 inch Vee nose, so 4 X 8 overall. It's not quite 5 feet high and weighs about 750 pounds empty
I bolted everything together and then welded every joint on the frame. I added a piece of channel from the crossmember just in front of the axle to the hitch so that I could lenghten the tongue by about 6 inches. This also gave me the support point for the Vee nose. I used a piece of 3/4 inch ply for the deck and bolted that to the frame with 10 3/8th inch cap screws. The welding and the ply really made the flimsy frame a rigid unit. I reversed the axle (put it above the springs) to lower the trailer and make it easier to ride the motorcycle up the rear door/ramp and into the trailer
The motorcycle weighs 600 pounds (1979 Honda CBX) and I've towed this combination right at 11,000 miles over the past 3 years. No 'fatal' problems with the axle or the bearings, but it did wear my tires funny . . . . much more worn on the inside edges than the outside. The wheels/tires are 175/80-13 on aluminum alloy wheels. The axle just isn't strong enough to keep from flexing when used on a 1350 pound trailer - I cannot imagine using this trailer at anything approaching the 1740 pound advertised capacity
I've always wanted to put matching wheels on the trailer to those on my car but with the HF axle, I couldn't make them fit - The axle is much too narrow for the high offset wheels used on a FWD car
So - I replaced the axle with the Reliable #1252 from Northern Tool. It's a standard axle with a 60 inch width, 48 inch spring centers and 1 inch axles. Since *NOTHING* on any HF trailer is 'standard' I had to cut the spring perches off the axle and narrow them to 45 1/2 so the axle would fit the frame. The stock HF hubs cannot be reused since the original axle is not 1 inch . . . . it's some smaller, metric number which makes the bearings nearly impossible to find in a pinch
I've about got it all back together and with the 205/55-15 tires on 15 by 6.5 inch BBS alloy wheels, it's going to look like a professionally built trailer for the first time
If I had it all to do over, I would forget about starting with the HF frame and running gear. Buy a STANDARD axle, (one that takes STANDARD hubs) some angle iron and weld up a complete frame. While the stamped tin frame, oddball lightweight axle and hubs are certainly sufficient for a lightweight teardrop, it's also important to have your project use standard parts so if you need to make a repair somewhere out on the road, you have a chance of getting parts
If you insist on going the HF route, by all means go and buy a second set of bearings and seals and carry them with you wherever you go - I think the only reason I never needed mine was because I was carrying the spares and because I removed the wheels and greased the bearings each time before I set out
Don