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Recent content by Shin-Ken 1074

  1. Shin-Ken 1074

    1981 GSX1100 Katana Based Project

    After clocking up 800 km I did the second engine oil and filter change today, this is the second oil change after the top end rebuild. The first oil change was at 300 km and this one after 500km from the first change. The drained oil has a few very small specs of metal but nothing serious. The...
  2. Shin-Ken 1074

    630 to 530 chain/sprockets on 1981 GS750L - Do it?

    Hi Andy, going from 630 to 530 is a very good idea and has all the benefits as pointed out by Nessism. The lighter chain and sprocket weight = less rotating mass (and as a bonus a lower static weight) that provides quicker rear wheel spool up time and crisp gear changes due to the lighter drive...
  3. Shin-Ken 1074

    Risks running pod filters in wet weather?

    If these work in the rain, pods shouldn't be a problem. Carbf4 by Max Mutarn, on Flickr
  4. Shin-Ken 1074

    1981 GSX1100 Katana Based Project

    Have done some more rides to test tyre pressures and for now have settled for 28 PSI front and 32 PSI rear. After 50km at legal speed the front pressure had gone from 28 PSI to 31 PSI and the rear from 32 PSI to 35 PSI. Grip and handling are good so the next thing to monitor is tyre wear. After...
  5. Shin-Ken 1074

    1981 GSX1100 Katana Based Project

    Tested the tyre pressure on a ride today with 27 PSI front and 32 PSI rear (cold tyres), on a 60 km ride on the open road. Handling and comfort are O.K. going over the same bumps and ripples as the previous ride with a similar increase in pressure once the tyres were at operating temperature...
  6. Shin-Ken 1074

    1981 GSX1100 Katana Based Project

    Hi Steve, thank you. All of those tiny changes to shave a few grams here and a few grams there in the end combine to make for a pretty big weight reduction. The power to weight ratio is where it all comes together, an 1197 cc engine with a few hotrod parts and weighing 10 kg less than a 1985...
  7. Shin-Ken 1074

    1981 GSX1100 Katana Based Project

    Have put a few more km on the Kat for the second 300 km break-in run. The tyre pressure is still being tweeked and for now the radials are running with 30 PSI front and 36 PSI rear. Handling and suspension is doing well at those pressures however, on the next ride I'll drop them to 29 PSI front...
  8. Shin-Ken 1074

    1981 GSX1100 Katana Based Project

    Hi Pete, glad to see you back on GSR mate. Yeah, we bolted the Kat back together at Derek's place a few weeks ago. Once the ring break in is done the Kat will be back on the North Side for some fun. The oil leak it had seems to have been cured, amazing how the oil stays inside the engine after...
  9. Shin-Ken 1074

    1981 GSX1100 Katana Based Project

    The replacement breather, 31 grams lighter and a tidy look. Breather 4 by Max Mutarn, on Flickr Breather 2 by Max Mutarn, on Flickr Running Tally : 197.902 kg.
  10. Shin-Ken 1074

    1981 GSX1100 Katana Based Project

    The weight reduction continues, it is only a few grams this time but every gram removed helps. The catch can breather never looked right so this weekend I swapped it for a lighter breather. breather 1 by Max Mutarn, on Flickr Breather 3 by Max Mutarn, on Flickr
  11. Shin-Ken 1074

    what did you wrench on today??

    Yeah, Nar, that "G" stuff is a mystery?
  12. Shin-Ken 1074

    what did you wrench on today??

    Hi Darryl, love ya work mate, detailed and spot on as usual. Parts on scales, that is Kat-nip to me, well done on the refresh and giving the 'G' a boost. Ya know that wasn't easy to say for me. Cheers.
  13. Shin-Ken 1074

    Pod Filters?

    Yes, tuning with the 02 sensor took it up through jets starting at 125 mains and finishing with 160 main jets. One of my friends has a very extensive range of Mikuni jets so we were able to go through them (9 sizes) until we hit the Goldilocks size jets. To be fair this is not a stock scooter...
  14. Shin-Ken 1074

    Pod Filters?

    Deleting the stock airbox makes some maintenance tasks soo much easier, like removing the carbs in less than 4 minutes and installing them in about 10 minutes. I stopped using pods and filter socks and now use stainless screens. Used an 02 sensor to find the optimum jetting to use with the...
  15. Shin-Ken 1074

    1981 GSX1100 Katana Based Project

    After the first 300 km test ride an oil change and inspection on the new engine found no problems. A few of the valve clearances needed adjusting and one of the cam followers was swapped for one with less wear to the face hardening. All the head stud nuts had backed off a few Nm and so all of...
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