If i could go back i feel my bike fealt sooo much better w the original stearing bearings, it was like a rock, changed 2 upgraded pin berings and a major woble at higher speeds.
The chain adjusters i got were of a lesser quality and the stock chain itself is way better than the heavy dutty one i got from jc whitny. The jcw.. chain broke on me i dont think the stock chain wud have. Just a heads up. Im always open minded, if anyone agrees or disagrees let us know. I know I will think twice b4 "upgrading" if it seems fine.
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If you mean you changed over to tapered roller bearings, the tapered roller bearings themselves are not the cause of your high speed wobble. You should look more closely at whether you did a proper installation.
I removed my stock steering ball bearings, and replaced them with "All balls" tapered roller bearings. I could not detect any difference in how my bike steered/handled. However, it was worthwhile, as I found the stock ball bearings had no grease left in them.The bike handled fine before and still handled fine afterwards.
There is a lot of internet hyperbole, that flys around on these web sites. Its a very common story that you
must replace the plastic swing arm bushings, otherwise you risk almost certain death on the road. I've been riding my 78SE for 8 years now, and my plastic bushing swing arm works just fine. However, I do grease my swing arm, that others may be forgetting.
Another tall tale, is that the stock alternator is crap and must be replaced with a PMA. Many mention the almost impossible task of having to replace the carbon brushes every 5 or 6 years. Hard to believe, but my stock alternator works great.
Keep an open mind, when lads on the web tell you about these "must do", so called, up grades. If your bike is running well, just keep the money in your pocket.
Many new lads jump right in, buying parts from places such as Mikesxs.com. They don't realize, that many of those parts are inferior, sub standard parts. They are made to a price point, and as such they don't fit properly, fail early, and sometimes are not even useable.
I've had to remove newly installed parts from Mikesxs, and re-install 30+ year old OEM parts, because the quality was so bad. The OEM Japanese parts on these bikes were very high quality, and because of that, they have lasted a very long time.
Its very worthwhile to search out OEM parts if they are available. Some parts on these bikes were used on other models, right up into 20xx years. Yes you will pay more, but you're not buying junk parts.