New Hawk, new adventures.

[Megadan]

Originally Posted by OneLeggedRider

Thanks for the recognition Dan and my bike is running amazingly well, I got it to 70mph today. But I know it's still running lean from the plug readings and the snap crackle pop when I let off the gas. So.. I've decided to get a different carb and start over. Haven't figured out which one yet but I will. And I'm considering taking this pilot to .5 before I ditch it, worst that can happen is I foul a plug lol. Also I feel that you're talents are being wasted, NASA needs good thorough engineers. ��

Of course. I always give credit where it is due. You were the first person to make the leap, so you have earned the right to it.

I am curious as to what carb you decide to go with. I know that I never had an issue getting my VM26 clone dialed in. This pumper, aside from some small tweaking, has been pretty decent in terms of getting it to run right. I am definitely interested in your results from going to a "50" pilot hole.

I would need to be an actual engineer first. Still need about 2 years of school before I can even test for a license lol. My thoroughness is just a part of my own personality and the nature of the work I do. I am the guy that takes longer to get a job done but the job only ever needs to be done once, and I am proud of that.

[JerryHawk250]

Good stuff Dan and OneLeggedRider. I'll need to play around with my PWK30 just to see if it makes any improvements. I'm running a 39 pilot @ 1 1/2 turns out and a 125 main. I hate to fool around with it because it seems to be running perfect. But I'll never know until I try it. The PWK30 was a big improvement over the PZ30 once I did the porting and decking.

I like the chain tensioner Dan. I see you never straighten the chain guide yet. lol I cut that tab off then aligned the guide with the chain and pop riveted it in place.

[NzBrakelathes]

Originally Posted by OneLeggedRider

Thanks for the recognition Dan and my bike is running amazingly well, I got it to 70mph today. But I know it's still running lean from the plug readings and the snap crackle pop when I let off the gas. So.. I've decided to get a different carb and start over. Haven't figured out which one yet but I will. And I'm considering taking this pilot to .5 before I ditch it, worst that can happen is I foul a plug lol. Also I feel that you're talents are being wasted, NASA needs good thorough engineers. 😊

When you get popping on decel open the air screw a little more till it all goes away - too lean is what I believe causes it.
My bikes if I open the screw a little each time it reduces till it pops no more.

[OneLeggedRider]

[QUOTE=JerryHawk250;307733]Good stuff Dan and OneLeggedRider. I'll need to play around with my PWK30 just to see if it makes any improvements. I'm running a 39 pilot @ 1 1/2 turns out and a 125 main. I hate to fool around with it because it seems to be running perfect. But I'll never know until I try it. The PWK30 was a big improvement over the PZ30 once I did the porting and decking.

Jerry I hate to even ask this question because I know that you know what you're doing when it comes to tuning. Have you done WOT plug reading runs with the setup you have now?

Also do you think the PWK30 would be a good choice for me as far as tunability? Keeping in mind I am planning on doing the porting and decking but haven't done it yet.

And Tako I absolutely refuse to go beyond 2 turns on the mixture screw. They drilled it into our brains anything below 1 turn out or above 2 turns out was out of the range of adjustability and clearly meant you needed a different size pilot jet. I've strayed far enough from my training by drilling the pilot, and that was only done out of necessity.

[JerryHawk250]

Originally Posted by OneLeggedRider

Jerry I hate to even ask this question because I know that you know what you're doing when it comes to tuning. Have you done WOT plug reading runs with the setup you have now?

Also do you think the PWK30 would be a good choice for me as far as tunability? Keeping in mind I am planning on doing the porting and decking but haven't done it yet.

And Tako I absolutely refuse to go beyond 2 turns on the mixture screw. They drilled it into our brains anything below 1 turn out or above 2 turns out was out of the range of adjustability and clearly meant you needed a different size pilot jet. I've strayed far enough from my training by drilling the pilot, and that was only done out of necessity.

Yes I have done plug reading from WOT. Looks perfect. I also used an A/R ratio gauge to help with tuning. Just curious if any improvements will be gained from low to midrange throttle. I like to tinker and experiment. If you watched my video in this thread http://www.chinariders.net/showthread.php?t=23589 I did a couple of WOT's at the 2:00 and 9:00 marks. Though you can't make out the speed, notice how quick it hits around the 8500 rpm mark through 4th gear. Both times I hit the 72-73 mph mark on the speedo before I let off the throttle which is almost dead on with my GPS. Like I said, I don't know if it will make a difference but worth a try.
If you are planning on porting and decking the PWK30 will be a good choice. Don't know if the power jet is really necessary. I've tried disabling the power jet and noticed a loss in throttle response.

[OneLeggedRider]

Wow Jerry, I'm jealous now, that son of a bit## runs! And you're pulling a lot higher gear ratio than me. My bike doesn't pull nearly that hard, takes a good minute to wind 4th gear out and you can't wind 5th out even going downhill. And I'm sure Dan's runs similar to yours. What octane are you running for the 10:1 CR?

Also you've got me convinced on the PWK30 for sure lol.

And Dan I didn't mean to hijack your thread, and would appreciate your thoughts on running the PWK30.

[JerryHawk250]

Originally Posted by OneLeggedRider

Wow Jerry, I'm jealous now, that son of a bit## runs! And you're pulling a lot higher gear ratio than me. My bike doesn't pull nearly that hard, takes a good minute to wind 4th gear out and you can't wind 5th out even going downhill. And I'm sure Dan's runs similar to yours. What octane are you running for the 10:1 CR?

Also you've got me convinced on the PWK30 for sure lol.



And Dan I didn't mean to hijack your thread, and would appreciate your thoughts on running the PWK30.

I'm running 93 octane non-ethanol gas.
I don't think Dan minds. It's all relative to his topic.

[Megadan]

Originally Posted by OneLeggedRider

My bike doesn't pull nearly that hard, takes a good minute to wind 4th gear out and you can't wind 5th out even going downhill. And I'm sure Dan's runs similar to yours. What octane are you running for the 10:1 CR?

Also you've got me convinced on the PWK30 for sure lol.

And Dan I didn't mean to hijack your thread, and would appreciate your thoughts on running the PWK30.

I don't mind a good hijacking if it is relevant and contains useful info.

As far as running similar, it does. The only thing I would say is different about mine vs. his is that mine pulls a little harder in the lower/middle of the RPM range and a bit less hard at the top end (but still winds out past 8000 very quickly). I would entirely put that down to the difference in the carbs - mine being both smaller and having an accel. pump - and maybe a tiny bit on the fact that I have even a little more compression than Jerry does (entirely by accident).

I can't really compare how quickly it goes through the gears because I am currently geared much shorter than Jerry is in that video. If Jerry threw on a 47 rear sprocket we could compare more directly. I get to 5th gear in a hurry lol. That is honestly why I am going to drop down to a 33 rear sprocket, to get myself back to the equivalent of a 17/45 and gain back some top speed and lower revs on the highway.

As far as the jetting on your PWK30, I am sure it is spot on. Running a smooth bore half moon flat slide, power jet aside, it is going to draw on the jets much differently and with less turbulence. That lack of turbulence will actually decrease the effective size of the pilot jet - a phenomenon experienced on real Mikuni carbs that run an under flow optimizer, where the pilot jet size is almost half that of a carb without it. It all has to do with the velocity of the air charge being much higher. Suffice it to say that our PZ30 clones are a turbulent mess by comparison.

Jerry, as far as the chain guide goes, I will get around to it eventually. It's actually not too bad, so I left it alone for now. I actually want to order a new one from CSC, get it lined up, and install it with a nutsert. The one on my bike is so hopelessly warped that I don't think I can save it/make it work.

As for fuel. Thanks to the extremely conservative ignition timing on these motors, even with 10.3:1 static compression I can run on 91 octane no problem, but I do try to fill with 93 whenever possible. 93 isn't available at every fuel station here, so 91 is what I tend to fill with the most. I also took care to smooth and polish my combustion chamber when doing the port work to ensure I had zero potential hot spots in the chamber.

[JerryHawk250]

If I throw the 15 tooth on front it will hit the 8500 rpm limiter in 5th gear no problem.

Yeah, I would say 91 octane is more than enough. Most of the ethanol free fuel around here is 92 and 93.

I'm still going to play around with the pilot jet just for the heck of it.

[NzBrakelathes]

[QUOTE=OneLeggedRider;307765]

Originally Posted by JerryHawk250

Good stuff Dan and OneLeggedRider. I'll need to play around with my PWK30 just to see if it makes any improvements. I'm running a 39 pilot @ 1 1/2 turns out and a 125 main. I hate to fool around with it because it seems to be running perfect. But I'll never know until I try it. The PWK30 was a big improvement over the PZ30 once I did the porting and decking.

Jerry I hate to even ask this question because I know that you know what you're doing when it comes to tuning. Have you done WOT plug reading runs with the setup you have now?

Also do you think the PWK30 would be a good choice for me as far as tunability? Keeping in mind I am planning on doing the porting and decking but haven't done it yet.

And Tako I absolutely refuse to go beyond 2 turns on the mixture screw. They drilled it into our brains anything below 1 turn out or above 2 turns out was out of the range of adjustability and clearly meant you needed a different size pilot jet. I've strayed far enough from my training by drilling the pilot, and that was only done out of necessity.

It’s essy to try n test theory
Won’t hurt at all but safer
Just for learning purposes
Then go back again

[Megadan]

I only did the drilling of the pilot jet because I happened to have an extra on hand. It is proving to be difficult to get fully dialed in, so I will have to disable the accelerator pump to get a better feel for it.

This is why everybody goes to the Mikuni clones. They are nowhere near as annoying to get the tune dialed in on. No idea why, but they are much easier.

[Megadan]

So I decided that a good way to spend a 53 degree overcast day was to take my Hawk on a little 130 mile mini tour along the Missouri River up through the Bluffs, forests, and wetlands. Nice windy little side roads and lots of steep hills. My rear end is sore like only a Hawk seat can manage.

A couple beauty shots that I just felt like taking. Some day soon I will setup my Go Pro to either a chest holder or a helmet and actually record a ride or two.

[Megadan]

I forgot to mention, I did have one little hiccup on my way home. The barrel on my throttle cable at the throttle broke off about 2 miles from home (thankfully). Hooray for cheap cables.

A drawback to the pumper carb with the 1/4 turn throttle and the double ended cable means I can't just use the factory cable without swapping out to the original throttle assembly, and then I lose the pumper functionality.

Thankfully there are US Based companies on ebay that sell the cables for a whopping $8 each with "fast and free" shipping. I ordered two, just in case it happens again, and they should be here by Saturday.

I also got another intake in for my PWK30 that is not the right angle. Flush another $5... At least I have a great supply of intake O-rings...

[Megadan]

Ok, so my throttle cables should be here tuesday or wednesday.

Since I was making an order for a few different parts I also decided to order in the parts needed for a hydraulic clutch conversion. The cost is relatively low. and I get adjustable levers with my new brake and clutch masters.

Links:
Brake/Clutch master cylinders. https://www.ebay.com/itm/Unversal-7-...72.m2749.l2649

Hose:
https://www.ebay.com/itm/Motorcycle-...72.m2749.l2649

Slave:
https://www.ebay.com/itm/Universal-M...72.m2749.l2649

For those interested, the clutch line does need to be 1200mm according to my measurements. I also measured the front brake line, which was surprisingly shorter at 1100mm. If I were to order a new one I would go with 1200 so I could route it a bit differently.

I also submitted my brake parts to ship today. The shipping was twice the cost of the parts

The funny thing is, total price for three brake rotors (more on that in a second) and a full set of "sintered" brake pads was maybe 10 bucks more than JUST one rotor through txpowersports.

So, why three rotors? Well, I ordered a rear and a front as part of a set *link: https://item.taobao.com/item.htm?id=...7207:273110631
The issue is, the bike in question came with both styles of forks even though the hub looks the same, and as a result there are two different brake rotors sold for it. So I decided to not risk the first rotor not fitting after waiting a couple of weeks for it, and ordered the other style of rotor. (middle option on this link with straight "spokes") https://item.taobao.com/item.htm?id=...207:1075833039
I figured for an extra 6 bucks (and 5 more shipping) I would rather be safe than sorry. If not for that, this would have cost less than just the front rotor from txpowersports.
The pads I ordered (cqr copper burning front and rear) https://item.taobao.com/item.htm?id=...7207:362297183

My plan is to see if both fronts will work or not. If they do both work, then I will gladly sell one of the two front rotors to whomever would be interested in it for roughly what it cost me to buy and ship it (about $25).

[JerryHawk250]

The lever set is the same as the ones I have except I have the cable clutch. They work way better than stock. I thought about doing the conversation too before I ordered the levers. Wasn't sure how well it was going to work. Now I'll know. lol