OK, the swing arm is out, pretty simple affair as you could imagine. The flex in the swing arm becomes apparent as soon as you remove the axle nut.It's a simple Japanese arch type design,without any reinforcement. The swing arm springs open about 3-4 mm.The bushings are made of a white plastic material. The exposed ends of which,on either side appear to have been reamed with hamster teeth, where the spacer slides through. The spacer has no movement, the swing arm pivots on the pivot bolt inside the spacer, metal to metal, bone dry. There is a .5-1.0 mm 's worth of slop inside the spacer/pivot bolt. Yikes!!! No wonder my high speed highway jaunts are a scary affair. It's like a Ducks ass after he gets out of the pond. . Time for a redesign Boys?
look back in history , (as posted above) when enfield (great britain) made proper frames , rather than "photocopied" frames?look at the old phosper bronze settup , seemed to work for over 50 yrs?
glad to see your making progress.Like I said in the PM its not the front end.In 1971 Yamaha Introduced the Poly Urathane Bushes on the RD in 1972 people had shifted to Bronze bushings. We have been making and exporting these for over a decade.Fixing the bronze swing arm bushings or the rollers I mentioned is a band aid fix at best.Its not going to cure your stability issues. Instead of becoming unsafe at 100 kmph it now do it at 105 kmph.For that your going to need a new swing arm.Since you have it off.Can you post the measurements i.e. how wide is the head stock.I can then see what other more modern bikes we have here which have better swing arms can be bolted on.Most of the other bikes here are mopeds i.e. 100-150 cc but they have better build swing arms. Which hold up even on 50 HP RDs.
Well, the swing arm on the UCE bikes is longer than the older Bullets.Perhaps that's an issue.If there's room for some gusseting or bracing, that might help.I know that on the older Bullets, they are stable at over 100mph, even with rubber bushes in there. And they can carve a turn quite well, too.Maybe the longer arm is showing some flex?
I haven't worn the original tires out yet, when I replace the front I'll try a 3.00 or 3.25 they should be nearly as tall as a 19, I'll keep the low profile rear because I'm short. But to be honest my bike handles fine I just don't care for low profile front tires. I'm looking at the pirelli MT66 3.00x18 for the front.
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