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If it goes above 300 degrees then I would shut it down. I think that 235 is a little low to start shooting warnings, I have known engines to run perfectly fine at 265 degrees. If your running around 230-270 your perfectly fine, continue to run it until its out of fuel.

-AxialLST
 
Continue your break-in process. It will take time and fuel. Just don't get impatient or your will risk damaging the engine.

By the time you burn through half a gallon, things should get much easier. When they are new and not fully broken in, needles don't do a whole lot. Once the piston/sleeve wear in properly, tune will be more noticeable when adjusting.

Right now, just try to tune it to keep the temps below 250 and keep blipping the throttle (quick short jabs to keep the fuel from building up too much in the engine/pipe) and gently driving it around either on pavement or hard pack. Stay out of the grass as it will create excess drag for break-in.

Both of my LRP's were pretty annoying until I got half a gallon through them. Once I got over the gallon hump, they would tune nice and run a cool 235F all day long (with mild variances of course).

If you get to 3/4 gallon and still are having immense problems, then we can poke around a bit. Check for leaks as we suggested, then go from there.


Time. The break-in process requires it, so don't rush it. ;)
 
Well no leak!!

So here is the update!
I found this over here and did for the most part the same. My settings were a little different, but not by much. I was able to keep the temp between 200F and 225F I'd run the car 1/4 throttle for about 10 minutes or so, and shut down. I'd let it cool for a while and do it again. I have gone through 2 tanks of fuel so far doing this, so I'm guessing all in all about 3 1/2 full tanks all together including my mishaps.
I think one of the big differences is I was running it on grass at first untill I saw your post about not doing that.
So now a new question...I was running it on my driveway, and my driveway is dirt and stone. When I spin my weels after a run I can hear the dirt in the arms...Should I pull it apart and clean it up? Or should it be ok?
Next question....How will I know when brake-in is complete?

Thanks
 
Grit in the moving parts is not a good thing, I would reccomend cleaning it out. I did my heat cycle break in for a total of 6 tanks, pushing it a little harder each time. At a gallon or so is when you can really tune for performance if you wish, or just keep tuning it like you are. After 6 tanks I was running it like any other engine, and here I am now at 2 gallons, and it still has great pinch. Glad to hear things are going better for you!


-AxialLST
 
One thing I think I have notice, but could be just me. On the 2nd tank I was giving it the same amount of throttle and it seem to kinda kick in and go a bit faster...could be just me but I was like "cool"

On a side note....What is a good kit to build one of these bad boys? (RC in general) I think it would help me learn the in's and outs. Be a good learning experience. I have read the baja 5b are good to build, and there is a website that has videos for each step. (totally different engine though)
BTW What the different between the baja's
 

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