First 2 stroke build with RAW 80cc engine

Kristof · Jul 16, 2011

Hi,

I just recieved my RAW kit. (how do i know if its really an 80cc RAW engine?, it has no stickers on it) I checked for missing parts and have done research.

This is what I did so far:
1. Checked for damage and missing parts.
2. Took apart engine, just the 3 covers, cylinder, and head.
3. Im on my way to Oreily auto parts and maybe ACE hardware to look for Castor oil or Opti - 2 oil and an NGK spark plug... I hope I find these. and maybe a K&N air filter... if its not too expensive.

I have not recieved my walmart bike yet, it will come in on monday.

Please add to the list.

I need tips for the break in of the engine.

Accidentally posted in pre motorized thread...

Kristof · Jul 16, 2011

I just went to both Oreilly and Ace, they don't have anything.

Not looking good. =[

Is it safe to break in engine with the stock spark plug/muffler and with cheap oil?

droc089 · Jul 16, 2011

not sure about a RAW engine, but I use a autolite 4093 it's the cheaper version of the ngk i believe but it works fine. There's a thread somewhere on here with a list of spark plugs you can use. I found it at the local Advance auto parts.

Kristof · Jul 16, 2011

Ive decided to order 3 x 12oz bottles of Opti-2 from Amazon for 6.85 a bottle.

Then i am going to order NGK spark plug, air filter, fuel filter, and maybe an expansion chamber.

Does the SBP air filter come with the red oil or can I buy from Oreilly?

Kristof · Jul 16, 2011

Oh, what do I use for chain oil???

Do I grease the gears too???

Is it worth taking it apart to grease anything inside? or does it even need to be greased? I just dont know...

Kristof · Jul 23, 2011

I noticed I have a hairline fracture/crack in my upper piston ring...should I be worried?

My dam Walmart bike has 2 bearing balls missing on the front wheel, left side of the hub. It should have 11 on each side, so I took one from the right side and put it in the left side and I now have 10 on each side. Will this be a problem?

The rear wheel lock nut was loose, so now I have to figure out how the **** I am going to tighten it correctly so that it wont loosen up and seize.

droc089 · Jul 24, 2011

My Cranbrooke front hub is the same, not sure of the number but the left side had more than the right. After I cleaned, grease and put it back together the right side of the hub would make a loud popping sound. When I went to take the wheel back off I notice a ball bearing on the ground. cleaned and stuck it in but both side still aren't same amount but it doesn't pop anymore so I think I'll be fine. I notice with the one bearing out it made a big gap, but once I added the new one the gap was about the size of one bearing.

About the piston ring..that doesn't sound good at all.

Kristof · Aug 3, 2011

Here are some pictures.

I had to shorten the Black down tube by about 5-6 inches:

Here is my awful soldering job, was a very quick one.
I bought a 45 degree copper tube so that carb will fit.
I used rubber to make a seal for the carb.

Kristof · Aug 3, 2011

How many times do i need to adjust clutch cable?

How hard is it supposed to be to pull clutch lever?

Al.Fisherman · Aug 3, 2011

Kristof said:
How many times do i need to adjust clutch cable?

How hard is it supposed to be to pull clutch lever?

Once my clutch was adjusted properly I haven't needed to adjust it much. This may be due to the fact that I need to only pull on the clutch handle with around 6# (tested with 6# mono fishing line)... I can use my pinky finger to pull the clutch handle. There are a few modifications that can be made to the clutch cable. The stock clutch set up is junk. You seen to have a good mechanical ability...make one of these..

....

Kristof · Aug 3, 2011

K, well I have to use about 10-20 lbs of force to pull the clutch lever with my thumb.

Is the stock set up supposed to be this difficult?

homejones · Aug 4, 2011

Kristof said:
K, well I have to use about 10-20 lbs of force to pull the clutch lever with my thumb.

Is the stock set up supposed to be this difficult?

Yes, for some reason it is. I immediately ordered one of Ron's clutch pulley's. Should be included with every kit.

Another thing that will help (even better when done in conjunction with Ron's clutch pulley) is to unsheath the clutch cable, lube it up with some grease and then reinsert into the cable housing. Should make the pull a little easier.

Finally, you don't really need the small spring in between the clutch bar and the engine clutch nut. Keep the big spring on there (before the clutch nut) which will act as a heat shield for the clutch cable.

Kristof · Aug 5, 2011

Ok, other than my gmail account being hacked. I was able to spend a little time with my bike today.

Once again, another head ache.

The three black studs are somehow grinding against the gear cover...

Mozenrath · Aug 5, 2011

I don't know why the studs would be grinding against the plate. I'm no expert, but I'm guessing the studs are too long. It couldn't really hurt to remove the flower-nut and the clutch plate and see what's under there. Perhaps the studs are not in properly, or something.

While you've got the cover off, get some moly grease and spread a little dab over the small gear. This will help extend the life of these gears.

Kristof · Aug 6, 2011

Mozenrath said:
I don't know why the studs would be grinding against the plate. I'm no expert, but I'm guessing the studs are too long. It couldn't really hurt to remove the flower-nut and the clutch plate and see what's under there. Perhaps the studs are not in properly, or something.

While you've got the cover off, get some moly grease and spread a little dab over the small gear. This will help extend the life of these gears.

I already did apply grease, but the aluminum shavings "soaked it all up".

No, its not too long. It just started to shave the cover not too long ago. I think it started to get loose...or the clutch pushing it out.

Kristof · Aug 6, 2011

I fixed the issue with the grinding. The issue was that the nuts that hold the gear and sprocket on the shaft were loose, so i tightened it up and now i dont hear grinding.

Clutch seems ok too.

I took her out on a spin today, about 5 miles total today non stop. I noticed that the copper exhaust pipe has discolored and the rubber hoses oozed out white stuff. Then I oiled the chain up, let it sit for 15 mins. Then I went on another 2 mile ride.

I will check my spark plug later today.

Kristof · Aug 7, 2011

I am running 75:1 mix with Opti 2 oil. With SBP Pipe (6 inch shorter) and untuned carb... i think. I dont know how to tune, but it is idling pretty well.

Here it is:

tim turbo · Aug 7, 2011

Really Al I have caught 15 pound fish on 6 pound line so your 6# test pull of your clutch seems a little off. I do not think that is an accurate comparison. Just saying.

Kristof · Aug 7, 2011

tim turbo said:
Really Al I have caught 15 pound fish on 6 pound line so your 6# test pull of your clutch seems a little off. I do not think that is an accurate comparison. Just saying.

So, is the spark plug ok?

Kristof · Aug 21, 2011

Lol, no one answered the spark plug question. But, whatever...I put about 75 miles on it by now.

First 2 stroke build with RAW 80cc engine

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