a few weeks back i picked up another used seca turbo (love these bikes!!) and it was actually running but something didn't seem quite right. got it on the
trailer to take it home after a short test ride and started to see some oil dripping out of the bottom end but the oil looked a little thin for some reason.
first thought was a blown seal near the turbo unit. the bike had been stored for a year by the previous owner. it has 28k miles and still runs so that's
good. when i run it in the garage i get oil coming out of a rusted thru area of the left pipe at the lowest point and some smoke out of the pipe end. decided
to drain the oil yesterday and oh boy what a surprise. way too much fluid coming out and it was totally thinned out and had a strong odor of gas in it. i can
think of several bad things that might account for this but wanted to listen to some suggestions before i start tearing things down. i want to ride this one,
not spend the summer rebuilding it! jim
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gas and oil??????
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 eagle3114 |
gas and oil?????? |
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Posts: 30 (05/18/09 12:06:39) Sunday Driver |
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glsommer |
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Posts: 7 (05/20/09 05:24:26) |
hi, I seem to remeber mine doing that and it was the fuel shutoff petcock. it flooded the carbs which in turn ran into the crankcase. hopefully you didn't
run the bike too long with the thinned out oil.
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SecaGazz |
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Posts: 244 (06/06/09 08:45:40) Wannabe |
This is quite common with these bikes (many posts), I had lots of trouble with this issue when I bought my bike a few years back. You will probably find that it's fuel bypassing the float valve in the carbs. I discovered that it wasn't the valve itself but the 'O' ring which fits around the valve and seals it to the carb body, replacing these 'O' rings sorted my problem. Make sure you use petrol resistant rings (Viton or similar). You can now buy complete overhaul kits for these cars at a reasonable price. The usual is, fuel in oil, oil thins, bypasses the oil check valve, into the turbo, into your exhaust onto the garage floor It's good practice to make sure your fuel tap closes properly (may need new rubber valve) and switch it off every time. Check your fuel check valve (on top of the carbs) works, mine doesn't but the good fuel tap and float valves keep it under control. Gazz |
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eagle3114 |
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Posts: 31 (06/08/09 06:57:19) Sunday Driver |
gazz - thanks for the reply. i had hoped that this was the situation and that it wasn't something more serious (like gas getting past bad rings). last
weekend my son and i swapped out the gas tank for one that was much cleaner inside and had a fuel shutoff valve that i rebuilt a year ago. we did a full oil
and filter change and took it out for a test ride. so far a week later i only have a small oil leak on the garage floor and the oil level window shows that
i'm not getting an increase in the volume in the case (i'm assuming that this means no more gas getting into the oil for the moment). if it turns out
that turning off the gas tank as a habit solves the problem then great, i won't need to fiddle with the carbs to check out all the rest of the stuff that
you suggested. if i need to i can swap out the carbs off my 'parts bike' (they were rebuilt a year ago when the 'parts bike' was running).
hopefully this will fix the problem. now i gotta work on the front brakes. currently they suck and i get 75% of my stopping power from the rear.
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