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Daddue, that's exactly the sound they would make... before. If you block up the front end to lift the front wheels off the ground you can spin them and apply the brakes then see if they spin free after releasing. My right brake handle would actually pull in farther the first squeeze after pulling the left--now it doesn't do that either. I guess I may be a unique case as far as the problems with this trike go. I knew going in that there may be problems to sort out, I had done my research. I knew this was a relatively new design and maybe wouldn't have all the bugs out of it yet. And I knew that the quality(and quality control) might be lacking, but I was willing to take the chance in order to have a unique vehicle that I could tinker with and maybe end up with something I really enjoy at a price thousands less than anything close(any reverse trike that is). And call me strange, but I actually LIKE working through these problems, finding solutions, and then at the end of the day(or days) getting to ride a head-turning vehicle with very unique handling characteristics... fun. Not that I am prepared to overhaul/rebuild the engine or reweld the frame. That's why I'm really curious to know just what happened to your trike. Hopefully it's something that can be repaired/replaced/revised without tearing the whole trike apart for welding work. Oh yeah, you commented on how your tach is let's say... less than accurate. Mine doesn't register either at idle but once it's above say 15 or 20 mph(sorry to rub it in, not sure what kph would be!) it seems fairly accurate and does not drop out while riding. You may have an issue with the pick up at the rear wheel or maybe if you get that new speedo head reading in mph that will solve it.
If you want to see a REALLY nice trike(and really expensive) check out the Hagane Japanese trike. Or my personal favorite and truly unique vehicle the Italian Quadro 4D. Now THAT'S impressive!

A few days ago I opened a thread asking if anyone knew anything about linked brakes. Due to the limited response I got(only jct842 commented) I'm guessin' not many of you are familiar with them or their operation. Well neither was I but I had to figure out why my front brakes would hang up after applying them with the right brake lever and then would completely release after applying the left brake lever. So I removed the proportioning(?) valve from my Sunny Roadrunner trike to see if I could figure out (a) how the damn thing works! And (b) why the hell it's not workin' right!
Well I'm pretty sure I found the answer to both questions and in the process uncovered a serious and potentially dangerous lack of quality control.

So here's the contraption as it looks on the trike.


Off the trike...


With top jam nut removed revealing spring loaded brass perforated cup(proportioning?)...


A little better detail of that brass cup with it partially removed...


And here with it fully removed. If you look close, you can see the first problem I found.


Beginning to remove the brass fitting...


And wth? is that piece of garbage in the center port?


Ooohhh... it's just a glob of metal shavings from the machining process. No worries having metal shavings/filings and God knows what other kind of crap in your brake lines...(why did I buy Chinese? Oh yeah, I'm cheap AND a glutton for punishment.)


Ok, now we get to the meat of this potato--the main plunger/piston/valve or whatever you want to call it.


I think this one is self explanatory...


Oh look, another clogged port, yay!
So I removed all of this metal shaving garbage, filed off the burrs, cleaned every part thoroughly to remove any foreign material(pun intended), and put it all back together. I haven't had a chance to refill the system and bleed it yet though, but I sure think that these partially clogged ports were the source of my problems. And if I am understanding how this thing works then when the right brake lever is squeazed this will apply ONLY the front brakes. When the left brake lever is applied it will apply the rear brake primarily but depending on how aggressively you're stopping it will also start to push that piston against the spring tension which will force the fluid into the front brake lines and apply the front brakes(just not as hard as the rear brake). The part I understand the least is that spring loaded brass "cup" thing in the fitting where the right brake lever line attaches. Maybe it's a one-way valve? I don't know why but I just like to understand how AND why things work... oh yeah, that's right, it's because I'm cheap and my labor is cheap. And if I understand it I'm more likely to be able to fix it. ;D

Just spent the last four hours refilling the brake fluid in the trike and bleeding the air out only to find that getting all that garbage out of the proportioning valve did absolutely nothing toward fixing the problem with the front brakes hanging up. A bit of harsh language helped to get me refocused. As I mentioned above I really didn't understand what that brass "cup" things purpose was but now I do... to screw up otherwise normally operating brakes! The more I got to thinking about how these brakes work the more I felt like that "cup" might be the problem. So I figured I'd just remove it and see what happened. What happened was now the brakes work perfectly. Right brake lever operates front brakes only and now releases immediately, and left brake lever applies the rear brake and then the fronts with increased pressure. So the "cup" and the spring were a type of one-way valve only needed in the head of whoever the engineer was that the Chinese copied it from!
Oh yeah, speaking of extra parts, guess what the UPS man dropped off today? My new fuel tank has finally arrived!(LOL!)
Sure glad I haven't been down for the count in the mean time! Biggest surprise is that the new fuel tank came with a cap, drain bolt, AND a brand new level sensor! Never expected that--figured if it was free it would be ONLY the part I needed. Definitely gonna bag and tag it and file it for future reference!

Sure glad to hear he got the vibration licked. Did he say if he adjusted in some toe? I mean if he spent that much time on the repairs I'm sure he made notes of the adjustments so he could repeat them if needed. Just curious.

Anybody know anything about linked brakes?? My new trike(a Sunny Roadrunner MC_D300TKB) has linked brakes and when I squeeze the right brake lever(which applies the front brakes almost exclusively) they hang up after releasing the lever(not completely hanging up but still dragging). If I squeeze the left brake(which applies mostly the rear brake along with some front) then release, this will release the fronts. System is all hydraulic-no cables. Master cylinder on each handle bar with lines going to a (proportioning?) valve then to each of the three wheels. I figure there's something hanging up in this valve but don't know what it looks like inside and sure would like a few pointers or suggestions if anybody has any. If a picture would help I can post one later.

Sure hope you get good news and get her all fixed up Justin. Hey daddue, you ever figure out what "let go" on Liberty?

Fellow reverse trike owners, you're being awful quiet... got me scared. What's up?