New Hawk, new adventures.

[Wild Dog]

Originally Posted by Megadan

So I may as well let the cat out of the bag now. I was finally able to contact somebody in Brazil that can sell me one of the WGK camshafts. Cost shipped is $95, so it is not the cheapest mod ever, but I think it makes more sense to try this to try and achieve my goals and get that last little bit of power out of my CG before dropping hundreds on a different engine, even if said engine has that extra gear I so crave. I am going for the WGK 1010851 which is designed to be installed without any other modifications to the engine, but increases total duration and overlap to shift the power curve up the RPM range a bit.

Nice and the price is more than OK for the price. Since you found someone that ships you from Brazil, try to source from them, some of this


Plus some better valves and springs.

[Megadan]

Originally Posted by Wild Dog

Nice and the price is more than OK for the price. Since you found someone that ships you from Brazil, try to source from them, some of this
Attachment 18957

Plus some better valves and springs.

I am actually not a fan of roller lifters/followers. Flat tappets are much simpler and more reliable. Valve springs shouldn't be necessary with the cam I am getting, but if they are I already know a source in the U.S. for Honda springs. As far as the valves, I would like better ones for sure.

I have possible plans involving my original head and some more serious engine work. For now I just want to push the envelope with what I have.

[Megadan]

Camshaft is on order. I await tracking information which should come sometime this morning. Then it is just the long wait for it to show up, likely at least 3 or 4 weeks. Been a while since I was excited about something with my Hawk. I hope that it pushes me into that extra bit of power I crave and opens up the rest of the RPM range. It's frustrating knowing that the engine could easily rev another 1500rpm safely, but just doesn't have the guts to get there.

[franque]

Do you care sharing with the class from whom you're ordering?

[Megadan]

Originally Posted by franque

Do you care sharing with the class from whom you're ordering?

Once I have the part in hand I will for sure. I want to make sure all goes well before I go sending others off with their hard earned money.

[JerryHawk250]

I hope this turns out to be a winner. I've ran out of mods to do on my Hawk.

[OneLeggedRider]

Originally Posted by JerryHawk250

I hope this turns out to be a winner. I've ran out of mods to do on my Hawk.

520 chain and Honda sprocket studs? 🤔

[Megadan]

Originally Posted by JerryHawk250

I hope this turns out to be a winner. I've ran out of mods to do on my Hawk.

I am sorta out of mods after the camshaft, at least short of going all out with the engine build, which isn't the point of what I am trying to do. I want to see how far I can take it without custom parts and expensive machine work.

I don't doubt that this cam will help me get where I want to be. I will gladly sacrifice a little mid range grunt if it means I can utilize the full rpm range of the motor. Especially after the head porting and PE30 carb. I have midrange to spare.

I am considering finding some upgraded pushrods to go along with the cam. 152mm length (1mm shorter) to compensate for the decked head and restore the geometry a little bit. I just dont remember the thickness off the top of my head.

[JerryHawk250]

That's my goal with my Hawk. Get the best performance out of the CG engine with just ad-ons and without getting into any major machine work. Just like the head work. I could of paid someone to do the work and machine down the head but showed that it can be done with minimal tools and skills. Is it perfect, Probably not but definite improvement. The cam will be the final mod that will more than likely get these engines running at there peak performance and not sacrifice reliability.

[Megadan]

They are monsterous machines for sure. 61hp and 47ft-lbs completely stock and a wet weight of 317lbs. They were called Big Red Pigs for a reason, but my goodness are they amazingly capable machines, and the power was honestly not too hard to manage. I have had the pleasure of riding one a couple of times, and they just felt built to fit me. I would have to toss a few modern CRF450 components on it, mainly forks and the 450L lighting package.

So in Hawk related news. I have the tracking info for the cam. It is sitting waiting to be shipped off. I decided I may as well do some other things while I have the motor apart, so I ordered a new piston and ring kit just to refresh the motor from my abuse of dialing in carbs and whatnot. The piston I ordered has whatever that black coating is on the crown. Not sure if it will make any sort of difference but it's so cheap I may as well right? Full gasket and O ring kit coming with it and some new cam follower arms to go with the cam as well.


I do want to look into the clutch as well as I would at least like to upgrade the clutch springs to get a little more clamping power. I haven't had any real clutch issues, but it can't hurt. EBC clutch springs are fairly inexpensive anyway, so again, why not?

[Its_not_a_honda]

Yeah Dan, it's just as fun to make a slow engine faster as it is to make a fast engine faster. The mechanical mind just likes to tinker.

[Megadan]

Originally Posted by Its_not_a_honda

Yeah Dan, it's just as fun to make a slow engine faster as it is to make a fast engine faster. The mechanical mind just likes to tinker.

Completely true! I just enjoy the challenge more than anything.


Update on the cam order. The cam is now in customs and has been for 3 days now. I know it can take up to a couple of weeks to clear before it is then shipped on from there. Hopefully the cam arrives by mid november.

Still waiting on my Aliexpress ordered goodies, but they should be arriving soon.

I decided to order a new cylinder to go with the piston and rings as a precaution, just in case the original cylinder is potentially scored. I figure for $44, why not? At the very least I can have a backup ready to go.

Temps and weather are supposed to be quite favorable today, so I may even get a short ride in.

[Megadan]

Cam arrived today. Got my new cylinder in as well. Just waiting on the cam followers, gaskets, and piston kit. Pictures to follow along with the contact information for ordering the camshaft. Just have to wait until I get home first.

[JerryHawk250]

Originally Posted by Megadan

Cam arrived today. Got my new cylinder in as well. Just waiting on the cam followers, gaskets, and piston kit. Pictures to follow along with the contact information for ordering the camshaft. Just have to wait until I get home first.

[Megadan]

So, as promised...

I will start with the information on where I ordered mine, as well as a second alternative. The camshaft I ordered is model number 1010851 from WGK. This cam profile has no extra lift, more duration, and a flatter peak for increased "overlap" between the two valves. It is designed/intended to be installed with no modifications to the engine for clearance reasons and will shift the power band of the motor up the RPM range, sacrificing some mid range power for more top end. Basically, if you are tired of your engine wheezing its way beyond 7000rpm, this will definitely solve that issue.
Cam spec card here (in Portugese, but its not hard to figure out). https://wgkindustria.com.br/wp-conte...CG-125-OHV.pdf

I ordered my camshaft by e-mailing RB Motos in Brazil directly, found here: sac@rbmotos.com.br
I got in contact with a person who spoke decent enough English and I simply stated that I wanted to purchase the WGK 1010851 camshaft. I was able to place my order through them by having them setup and send an invoice via Paypal through which I paid. Total cost for all things involved, $95. Time frame was pretty typical for most international orders I have made, so expect to wait 3 or 4 weeks.

Alternative option is to talk to a gentleman that works at/with WGK more directly. I asked if he would be ok with me sharing his information to others here that may want to order anything from WGK and he agreed. His contact name is Douglas Carvalho, E-mail is douglasernani@hotmail.com He speaks pretty darn good English too.

In regards to the fitment, I can understand why many would hesitate to drop this kind of money on something that doesn't show a listing to work specifically with a CG250 engine. I took the leap because from every bit of information I could find, the specs of the camshafts themselves are the same across almost every model with the only difference being how the cam is mounted to the gear. One style is via snap ring, and the other is a press fit. I confirmed with two different Hawk owners that had to tear down their engine that our engines use the snap ring style camshafts, so I ordered with some confidence. That said, if you want to eliminate any and all guess work when it comes to your money, then the only way to know 100% for sure would be to tear down your motor far enough to remove the camshaft.

In short, do your due diligence or order at your own risk.

Moving on to pictures. I actually got the cylinder and piston in along with the camshaft. So all I am waiting on at this point is the cam followers and the gasket kit.








Maybe, just maybe, I can get it installed in an easy weekend and get at least a break in run going, but the weather turned south really quick with the high temps now sitting in the 20's, so I am not sure how soon I will be able to actually get it up and running. Fingers crossed for at least some 40 or 50 degree weather here soon.

I already gapped the rings and checked the piston to wall clearance at a few points. So far everything is within spec, which is nice.