Popular Post beano123 Posted December 19, 2015 Popular Post Share Posted December 19, 2015 Well after doing loads of research i decided to buy a KM X2 so popped up to Blackburn this morning to first have a good look at one in the flesh and liked what I saw so bought one and a kill switch while I was there. Good helpful service from the staff at RC ModelZ who talked through some of the things that needed doing to the model before running it ie changing of the diff oils and making sure everything is tight etc. I won't bore you all with lots of pictures as we all know what it looks like but I will keep you posted on what I find when I strip it down over the next week or so. Mark. 6 Quote Link to comment Share on other sites More sharing options...
John_RCModelz Posted December 19, 2015 Share Posted December 19, 2015 Have fun and if you need anything nip in or give us a call. Quote Link to comment Share on other sites More sharing options...
beano123 Posted December 19, 2015 Author Share Posted December 19, 2015 32 minutes ago, John_RCModelz said: Have fun and if you need anything nip in or give us a call. Thanks John will do. Cheers Mark. Quote Link to comment Share on other sites More sharing options...
Oh How Original Posted December 20, 2015 Share Posted December 20, 2015 Looking forward to hearing what you think of it Quote Link to comment Share on other sites More sharing options...
beano123 Posted December 20, 2015 Author Share Posted December 20, 2015 (edited) Had a look at the X2 today and everything was tight so decided to fire it up. First off I reset the end points of both throttle and steering to 50% as I had been told that the servo's could burn out if left at factory settings. With this done I put a third of a tank of fuel in it primed it and 3rd pull of the starter it fired up and settled at a fast idle. After a few minutes I turned the idle screw done a tad and the engine idled perfectly so let it run for about 20 minutes. So far I'm quite impressed. I was told that my X2 is from the 5th batch imported and KM have ironed out a few of the niggles which have plagued the earlier batches i'm not saying its perfect but so far so good. Edited December 20, 2015 by beano123 Quote Link to comment Share on other sites More sharing options...
Nitroholic Posted December 20, 2015 Share Posted December 20, 2015 Why did you leave it to idle for 20 minutes? This is NOT a nitro engine and does not need a 'break in' .... just gentle running for a tank or so. Idling a 2 stroke for extended periods is just a good way of fouling a plug and filling up the crankcase with unburnt fuel. It has no value whatsoever. 2 Quote Link to comment Share on other sites More sharing options...
scatteh316 Posted December 21, 2015 Share Posted December 21, 2015 7 hours ago, Nitroholic said: Why did you leave it to idle for 20 minutes? This is NOT a nitro engine and does not need a 'break in' .... just gentle running for a tank or so. Idling a 2 stroke for extended periods is just a good way of fouling a plug and filling up the crankcase with unburnt fuel. It has no value whatsoever. It's his first petrol 2 stroke and pretty much every where says to run the engine in, seems harsh having a moan at him for thinking what he thought best on HIS engine. And there's still no clear answer in regards to petrol 2 stroke engine break in and the necessity of it. Quote Link to comment Share on other sites More sharing options...
Carpmart Posted December 21, 2015 Share Posted December 21, 2015 (edited) 42 minutes ago, scatteh316 said: It's his first petrol 2 stroke and pretty much every where says to run the engine in, seems harsh having a moan at him for thinking what he thought best on HIS engine. And there's still no clear answer in regards to petrol 2 stroke engine break in and the necessity of it. I'm not sure why you're such a provocative poster? I fail to see where there is any 'moaning' going on whatsoever? nitoholic's post, as all of his are, is about ensuring that good quality FACTUAL information is available on this site. This means that in 15 months when someone searches, they don't think that idling a two stroke is necessary, the norm or indeed desirable in any way whatsoever. Edited December 21, 2015 by Carpmart 1 Quote Link to comment Share on other sites More sharing options...
.AJ. Posted December 21, 2015 Share Posted December 21, 2015 Stock settings on carb, fire it up, set EPA to 50%, let it warm up for a couple mins, then drive around in figures of 8 with NO WOT for half a tank, let it cool down, do the same for the rest of the tank, then 100% EPA and drive like you stole it!! Oh im a petrol noob, but used the above for 2 engines and 1 race ported head kit and had zero issues 2 Quote Link to comment Share on other sites More sharing options...
beano123 Posted December 21, 2015 Author Share Posted December 21, 2015 I just wanted to make sure it ran and it does so i'm happy. Next opportunity I get it will be driven around slowly to break in everything else including me. Mark. Quote Link to comment Share on other sites More sharing options...
beano123 Posted December 21, 2015 Author Share Posted December 21, 2015 10 hours ago, Nitroholic said: Why did you leave it to idle for 20 minutes? This is NOT a nitro engine and does not need a 'break in' .... just gentle running for a tank or so. Idling a 2 stroke for extended periods is just a good way of fouling a plug and filling up the crankcase with unburnt fuel. It has no value whatsoever. Just been watching the ORB engine break in video and it seems i've done it right according to them. As an engineer who has worked with all kinds of engines over the years I think I've got an idea on how to do things. Quote Link to comment Share on other sites More sharing options...
Bigjimknickers Posted December 21, 2015 Share Posted December 21, 2015 I did that with my KM too, apparently the OBR vid is meant for highly modded engines, these are simple weed wackers that just need a gentle tank/half tank then WoT!! 1 Quote Link to comment Share on other sites More sharing options...
Bigjimknickers Posted December 21, 2015 Share Posted December 21, 2015 OH, & as for pics... there are never enough!! Get some loaded!! Quote Link to comment Share on other sites More sharing options...
scatteh316 Posted December 21, 2015 Share Posted December 21, 2015 3 hours ago, Carpmart said: I'm not sure why you're such a provocative poster? I fail to see where there is any 'moaning' going on whatsoever? nitoholic's post, as all of his are, is about ensuring that good quality FACTUAL information is available on this site. This means that in 15 months when someone searches, they don't think that idling a two stroke is necessary, the norm or indeed desirable in any way whatsoever. There is no factual information in regards to break in of these engines, I don't break mine in as there's no point and I'm impatient. But if someone else chooses to do it for peace of mind then that's up to them. Also should of known you would be in this thread as it has X2 in the title Quote Link to comment Share on other sites More sharing options...
Nitroholic Posted December 21, 2015 Share Posted December 21, 2015 5 hours ago, scatteh316 said: It's his first petrol 2 stroke and pretty much every where says to run the engine in, seems harsh having a moan at him for thinking what he thought best on HIS engine. And there's still no clear answer in regards to petrol 2 stroke engine break in and the necessity of it. It's not a 'moan' and neither is it harsh. There are also PLENTY of sources for information regarding running in piston ported single ring 2 stroke engines. Just depends where you look and how you search. And being 'impatient' clearly has not resulted in a blown engine...though I would not advise that as an approach. These motors use plated barrels, so it is only the ring that beds in really. It's a thin coating...and when that wears, it's time to replace the head. That and bearings and seals to settle in and gaskets. I always check all the critical nuts and bolts as they can slack off after a few heat cycles. 'Break In' is for nitro engines that do not use rings, and rely on a tight tolerance to give compression, along with a liner that is not machined parallel. The piston squashes into the bore, and you have to do that gradually with excess lubrication. The heat levels are also critical as you get differing thermal expansion between the alloy piston and the chromed brass liner. 1 Quote Link to comment Share on other sites More sharing options...
HomerSimpson Posted December 21, 2015 Share Posted December 21, 2015 I know one or two lads that are fastidious when running in.. however for me after 10 or so laps thats it... Go Race!!!!!! Quote Link to comment Share on other sites More sharing options...
beano123 Posted December 21, 2015 Author Share Posted December 21, 2015 Many thanks for your input lads its appreciated. Mark. 1 Quote Link to comment Share on other sites More sharing options...
Carpmart Posted December 21, 2015 Share Posted December 21, 2015 10 hours ago, scatteh316 said: There is no factual information in regards to break in of these engines, I don't break mine in as there's no point and I'm impatient. But if someone else chooses to do it for peace of mind then that's up to them. Also should of known you would be in this thread as it has X2 in the title Should of known you'd be on this thread posting drivel as usual... 1 Quote Link to comment Share on other sites More sharing options...
Oh How Original Posted December 22, 2015 Share Posted December 22, 2015 I'm personally not having a go, but don't take too much notice of what the mighty yanks say. It's your engine and do with it as you wish, but it can be very disheartening if you have a bad experience early on. What NH is absolutely sound advice, I've run in at least 20 engines in my years in the hobby, that exact way. Having it idling for prolonger periods of time will definitely create unnecessary heat build up. That is factual, despite what some people think, there has been plenty of tests done over the years that confirm this. Quote Link to comment Share on other sites More sharing options...
beano123 Posted December 23, 2015 Author Share Posted December 23, 2015 Managed to get the X2 break in complete today, ran the truck around at slow to moderate speed for a tank then upped the speed a bit for the next one then let rip with the last one. I must say the truck is superb the last tank was a blast running on wet tarmac had it power sliding all over the place. So far no problems no leaky diffs or anything. Well happy. Mark. 3 Quote Link to comment Share on other sites More sharing options...
scatteh316 Posted December 23, 2015 Share Posted December 23, 2015 They've really sorted the quality control on the latest X2's now.... Quote Link to comment Share on other sites More sharing options...
sean-vrs Posted December 23, 2015 Share Posted December 23, 2015 17 minutes ago, scatteh316 said: They've really sorted the quality control on the latest X2's now.... Is the shell any better? 1 Quote Link to comment Share on other sites More sharing options...
beano123 Posted December 23, 2015 Author Share Posted December 23, 2015 50 minutes ago, sean-vrs said: Is the shell any better? We will have to wait and see, hope to give it a bit of a bashing on Sunday. Quote Link to comment Share on other sites More sharing options...
beano123 Posted December 24, 2015 Author Share Posted December 24, 2015 (edited) I thought I would order some bling for the X2. So far I've fitted all the alloy hop up parts that came with it and added alloy billet shock towers,yet to fit DT1 air filter, DDM intake stack and outerwear filter cover and a body wrap from Joker designs which is for the 5t but who cares. I'll post a picture when its done. Edited December 24, 2015 by beano123 Quote Link to comment Share on other sites More sharing options...
rctruckz Posted December 25, 2015 Share Posted December 25, 2015 (edited) On 21/12/2015, 06:45:45, scatteh316 said: It's his first petrol 2 stroke and pretty much every where says to run the engine in, seems harsh having a moan at him for thinking what he thought best on HIS engine. And there's still no clear answer in regards to petrol 2 stroke engine break in and the necessity of it. Almost everyone i know have just ran there engines gently (ie: no more than 3/4 throttle for about 3 tanks, then let rip, this is how i did it with my original zen 260, and it lasted years, literally, infact it still works as i gave it to a mate and he uses it now :-) a couple of my mates also just run them hard as from 1st tank doing WOT etc, again no problems.. as nitro said, these engines are nowt like nitro, they are however very similar to strimmer engines, and we use these with WOT from new with no break in :-) Edited December 25, 2015 by rctruckz Quote Link to comment Share on other sites More sharing options...
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