floody Posted September 6, 2009 Share Posted September 6, 2009 (edited) MY HOBAO HYPER 21 ENGINE IS BORPING EVERY TIME I PUT THE THROTTLE ON WHAT DO I DO TO PREVENT THIS FROM HAPPENING OR AND ALSO ITS GOT A K&N AIR FILTER ON IT Edited September 6, 2009 by floody Quote Link to comment Share on other sites More sharing options...
seanmcgrath48 Posted September 6, 2009 Share Posted September 6, 2009 Welcome to the forum.... First thing turn CAP lock off..theres no need to shout... Sounds like it mite be a bit lean...try riching out the HSN K+N style airfilters WILL KILL your engine.... Quote Link to comment Share on other sites More sharing options...
Nitroholic Posted September 6, 2009 Share Posted September 6, 2009 Ahh..the K&N air-filter. As a long time motorcyclist brought up on a diet of ratty old jap fours, I have had more than my fair share of fun with these beauties. Enough to know I wouldn't want one on a buggy! They don't filter out the dust and grit unless you get an oiled type...then they clog up really quickly. They are also virtually impossible to clean and re-use. If used dry, they allow more air to flow through which would tend to lean off the mixture. Fine if you can tune to suit, but with the limited amount of tuning available on a nitro engines carb, it will always be a compromise between pick up and top end. Both my buggies run oiled foam filters...one a single layer one...the other has a second outer layer. Judging from the fact that they need a good clean after every run, I wouldn't run with anything else. A K&N with a chrome end may look shiny....but when you think of the revs these engines run at, getting grit and dust in will ruin an engine in no time at all. On top of that, I would think the air filter is probably one of the most likely reasons for your motor to be running lean. If you have just fitted the filter, I would swap back and see if the trouble goes away. If not, check it for damage or holes etc. Quote Link to comment Share on other sites More sharing options...
Revorocks Posted September 6, 2009 Share Posted September 6, 2009 Firstly, turn off caps Secondly, Welcome to the forums. Remove the K&N style filter, they suck to put it mildly. Use the original airfilter. What do you mean "borping"? Does it sound like its bogging down and spluttering from too much fuel, or is the engine really jumpy? Ifs it's bogging down then its too rich and you need to lean it out a bit. Adjust 1/8 of a turn at a time Quote Link to comment Share on other sites More sharing options...
Dirty Electro Posted September 6, 2009 Share Posted September 6, 2009 Getting rid of the K&N might help, I'll be polite and use the word rubbish to describe it. I dont think they are proper buggy filters anyway, they're based on rocker cover breather filters for V8's and stuff like that. 1 Quote Link to comment Share on other sites More sharing options...
seanmcgrath48 Posted September 6, 2009 Share Posted September 6, 2009 Getting rid of the K&N might help, I'll be polite and use the word rubbish to describe it. I dont think they are proper buggy filters anyway, they're based on rocker cover breather filters for V8's and stuff like that. Thats the only thing there good for Breathers,,,,NOT filters.... Quote Link to comment Share on other sites More sharing options...
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