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Recent content by brit7.11

  1. brit7.11

    GS425 Oil Consumption. Problem?

    I think I can wrap this up now. I've had a 2nd set of barrels bored to suit the original + 0.5mm pistons and rings. The first bore was too loose. I spoke to a well known motorcycle specialist engine place, and they bored it tighter; exactly on, or just slightly under the 67.5mm spec. Pistons...
  2. brit7.11

    GS425 Oil Consumption. Problem?

    After stripping down and fully measuring everything, I believe the barrels were bored with too much clearance. I measure the LH cylinder at 67.54mm and the RH at 67.53mm. This ties in with the LH cylinder having more carbon deposits, a dirtier plug and oily spoilt from the exhaust. That's...
  3. brit7.11

    GS425 Oil Consumption. Problem?

    Thanks for the inputs. Given the carbon deposits on the plug, and the black muck coming out of the LH pipe (although no smoke), I've concluded that I need to strip the top end. I've got the head off so far......barrels are being reluctant! There's loads of carbon build-up in the LH combustion...
  4. brit7.11

    GS425 Oil Consumption. Problem?

    Interesting. Thanks.
  5. brit7.11

    GS425 Oil Consumption. Problem?

    I did some further checking today, after a 250 mile run yesterdayafter which i topped up 500ml(!!). The attached pic shows the plugs. The left hand plug has significantly more deposits than the right. I hadn't noticed this before. Also, I held a clean white cloth over the end of each pipe while...
  6. brit7.11

    GS425 Oil Consumption. Problem?

    The airbox has an open drain pipe from the bottom. I have noticed a drip or two from this, but again, not a huge amount. 20W50 is fine for here. I have thought about trying another brand of oil to rule out evaporative losses. If oil is going through the breather system, does it not cause...
  7. brit7.11

    GS425 Oil Consumption. Problem?

    I'm hoping someone can offer some input on this issue. I recently rebuilt my 79 GS425, as it was using oil and leaking from the head gasket (courtesy of an iffy rebuild whilst with a previous owner), and was lucky enough to find NOS +0.5mm pistons and rings. The cylinders were bored by my local...
  8. brit7.11

    GS400 Boyer Ignition Timing

    You have that fitted 180 degrees out.
  9. brit7.11

    Cruzin Image GS400 Big Bore- Fit GS425?

    I think I'll end up trying them. Lil Suzi is running well, so no immediate plans for rebuild, but watching a slight head gasket misting with interest! Kind of itching to pull it apart, but enjoying riding it too much.
  10. brit7.11

    Cruzin Image GS400 Big Bore- Fit GS425?

    Here's a pic of 'Little Suzy' in the Cairngorms.
  11. brit7.11

    Cruzin Image GS400 Big Bore- Fit GS425?

    Thanks for the replies. These are 69mm pistons, so only 2mm oversize for the 425, so i cant see any reason why they wouldn't fit. I'm not looking for a performance upgrade, just a good rebore option for when I do a full rebuild. Genuine Suzuki parts are hard to find and really expensive. I've...
  12. brit7.11

    Cruzin Image GS400 Big Bore- Fit GS425?

    As per the title, is there any reason why the Cruzin Image big bore kit for the GS400 would not fit a GS425? I believe the 425 only differs in bore size, so can't see why not, but anybody done it? I emailed Cruzin Image, but they were unable to confirm. Many thanks.
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