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NorthantsPete |
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NorthantsPete Two Stroke Sniffer
Joined: 28 Jun 2021 Karma :
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Posted: 16:17 - 07 Sep 2021 Post subject: RXS100 died today :( |
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So the other day I was out on t he so far old faithful
It cut out about 40 mins into my journey when the air temp was warm. a bit like when you need to switch to reserve when out of fuel so i did.
It made no difference. I kicked it again, and off i went. I stopped off an then came home ok
Topped off the oil reservoir, 2/3 full. Went out today, all going fine but it was a hot morning, again around 40 mins in, i pulled over and set my route home. I then came to a bumpy hill, I revved it so i could get up and at the top it cut out.
I kicked and kicked until it was flooded so tried later in the shade. I got it going by pushing it down the hill, getting it to catch at 200-3k.. gently squeeze the throttle, the revs would creep up to 3k, any higher die, so let it idle there.
squeezed throttle a bit more then got higher and higher , couple of back fires then it was ticking over but no more than 5k.
I then came home, no more than 5k and 30ish mph... i had no power at all really, it was only when i got a mile from home to a massive hill, a car was right up my *rse and wouldnt overtake, i dropped a gear let the revs raise and then it slowly cut out and went RATTLE RATTLE CLUNK and appeared seized. Clutch in quick and had to push it home in million degree heat. (selected neutral ok)
Thinking i had a duff plug and and ive flooded the engine with too much throttle, i took it out, no hydraulic lock.
It goes up and down the gears ok but wont turn over at all.
Im guessing, in the heat, its siezed... next question, whats the course of action? I poured in some 2 stroke oil to see if it would free, nothing.
rocked back and forth, nothing.
It could be lower end but id expect some case damage... doesnt mean it hasnt failed lower end though.
So, to recap, some warning sign
i) cutting out like no fuel (possible mini seize?)
ii) then it eventually got going but wasnt happy (at the time thought fuel supply or electrics/bad plug)
iii) eventually stalled altogether and now wont turn over.
thoughts, bottom end gone (but why would it stall then go) or the oil wasnt being supplied properly and its seized (how to check)
Ive had 2 strokes fail before, usually me being stupid and forgetting oil, or blowing a gasket from revs, easily replaced, but this was all topped up and ready to go. Tesco premium fuel so should be ok (said e5). ____________________ ==========================
No sense but plenty of determination |
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NorthantsPete |
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NorthantsPete Two Stroke Sniffer
Joined: 28 Jun 2021 Karma :
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Posted: 16:31 - 07 Sep 2021 Post subject: |
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ah dear, im reading this and it sounds like 100% seized. https://www.off-road.com/dirtbike/tech/dirt-bike-tech-twostroke-seizure-52428.html
not all bad as the top end is easier fix than the lower end i guess but i need to find why it happened.
the engine wasnt cold, i used really good synthetic oil and good fuel (im lead to believe)
I have never taken the head apart though, the haynes manual doesnt ask me to either... but i keep up with the rest. The air filter is stock and oiled. Maybe i didnt oil it enough when i last cleaned it. ____________________ ==========================
No sense but plenty of determination |
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doggone |
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doggone World Chat Champion
Joined: 20 May 2004 Karma :
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A100man |
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A100man World Chat Champion
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redeem ouzzer |
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redeem ouzzer World Chat Champion
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NorthantsPete |
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NorthantsPete Two Stroke Sniffer
Joined: 28 Jun 2021 Karma :
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Posted: 10:20 - 08 Sep 2021 Post subject: |
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Yep, i had suspicions it was running lean as it seems a bit too hot and i was so careful not to engine break on big hills to avoid starvation of oil. it never really smoked either, plug and exhaust was clean as a whistle, so again sounds lean.
The air filter, i think is not oily enough could well be one reason, but ive also never taken the carb off
idle, not mega rough once going a little temperamental on startup having to blip it a bit before warm
2 stroke oil wise, they had crap back in the 80s, im using fully synth race oil as i have loads i presume it will exceed spec
other than that, I will need to check oil feed pipe not blocked, im unsure how to test the flow rate though? Haynes says i need a 'special tool' so come on give us a clue, special tool brings allsorts up in google ____________________ ==========================
No sense but plenty of determination |
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redeem ouzzer |
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redeem ouzzer World Chat Champion
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NorthantsPete |
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NorthantsPete Two Stroke Sniffer
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Nobby the Bastard |
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Nobby the Bastard Harley Gaydar
Joined: 16 Aug 2013 Karma :
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mentalboy |
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mentalboy World Chat Champion
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NorthantsPete |
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NorthantsPete Two Stroke Sniffer
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stinkwheel |
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stinkwheel Bovine Proctologist
Joined: 12 Jul 2004 Karma :
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NorthantsPete |
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NorthantsPete Two Stroke Sniffer
Joined: 28 Jun 2021 Karma :
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Posted: 12:27 - 10 Sep 2021 Post subject: |
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so when the gypsey said "well its recently been rebuilt"... he meant 'sort of.
I noticed the front two barrel bolts were also hand tight!
wont have helped.
so when i hit bumps int he road and flawed it like a rallycross rider, the pins finally dislodged and voila.
5 miles later one catches on a port and clunk.
now to decide if the top end can just be replaced or if its a full rebuild ____________________ ==========================
No sense but plenty of determination |
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redeem ouzzer |
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redeem ouzzer World Chat Champion
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Posted: 13:44 - 10 Sep 2021 Post subject: |
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NorthantsPete wrote: | so when the gypsey said "well its recently been rebuilt"... he meant 'sort of.
I noticed the front two barrel bolts were also hand tight!
wont have helped.
so when i hit bumps int he road and flawed it like a rallycross rider, the pins finally dislodged and voila.
5 miles later one catches on a port and clunk.
now to decide if the top end can just be replaced or if its a full rebuild |
Are the pins out of the little end or big end??? Regardless they didn't come out because of bumps in the road, the bearing came apart because it was seriously worn and you continued thrashing it like a red headed step child. I don't believe for second that engine didn't sound like two skeletons fucking in a dustbin before it let go. If the big end has died you'll be needing a crank rebuild for sure, although you might need one anyway looking at the fucking state of the engine. For what it costs i'd be chucking a rebore and piston at it as well, then you know it's back to health. It's a bit of a rookie blow up though, my YR5 spat a ring peg and the rings caught in the ports with enough gutso to crack the liner under the transfer port. I just cut that bit of liner out and stuck a hone down it cause i'm a fucking pro. ____________________ Be a REAL MAN! |
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NorthantsPete |
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NorthantsPete Two Stroke Sniffer
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Nobby the Bastard |
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Nobby the Bastard Harley Gaydar
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stinkwheel |
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stinkwheel Bovine Proctologist
Joined: 12 Jul 2004 Karma :
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Posted: 14:47 - 10 Sep 2021 Post subject: |
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A100man |
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A100man World Chat Champion
Joined: 19 Aug 2013 Karma :
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NorthantsPete |
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NorthantsPete Two Stroke Sniffer
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doggone |
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doggone World Chat Champion
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stinkwheel |
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stinkwheel Bovine Proctologist
Joined: 12 Jul 2004 Karma :
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Posted: 09:05 - 14 Sep 2021 Post subject: |
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Or just get it re-bored and neaten up/radius out any remaining rough edges on the ports with a burr/file so they don't form a stress riser. Doesn't look like there are any large scores in the liner itself (although it's hard to appreciate how deep that one is from the picture, hopefully more shallow than one of the available oversizes). It's a fairly peaky engine but equally, it's still an air-cooled learner bike, not a KR1S.
People have done far worse to ports on learner 2-strokes with a hand file in a cack-handed attempt to tune them. ____________________ “Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles. |
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A100man |
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A100man World Chat Champion
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A100man |
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A100man World Chat Champion
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Posted: 11:00 - 14 Sep 2021 Post subject: |
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or maybe..
https://www.ebay.co.uk/itm/402785268616? ____________________ Now: A100, GT250A, XJ598, FZ750
Then: Fizz, RS200, KL250, XJ550, Laverda Alpina, XJ600, FZS600 |
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Fat Angry Scotsman |
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Fat Angry Scotsman World Chat Champion
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NorthantsPete |
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NorthantsPete Two Stroke Sniffer
Joined: 28 Jun 2021 Karma :
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Posted: 13:47 - 14 Sep 2021 Post subject: |
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that could be a shout as i cant find barrels ____________________ ==========================
No sense but plenty of determination |
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Old Thread Alert!
The last post was made 2 years, 197 days ago. Instead of replying here, would creating a new thread be more useful? |
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