Spamwood Posted June 10, 2018 Posted June 10, 2018 So I'm close to re assembling my gs1000 engine with new 1085 Wiesco pistons. There seems to be various opinions on how to run them in, some say gently, some say just ride normally but don't thrash it, some say 500 miles, some say 1000. The guy who did my ref bore said don't run it in too gently because Wiesco pistons are known to glaze if run in too slow. Opinions and experiences please. Quote
kiwi Posted June 10, 2018 Posted June 10, 2018 Ask Roger upperton he's your engine man , and i'll bet he says not to ride it light as yes you'll glaze the bores Quote
Duckndive Posted June 10, 2018 Posted June 10, 2018 I read someware Roger had posted "may have been faceache" Assemble the pistons into "DRY" bore and by the time you have dialled in the cams the rings will be seated...... Works for me... Quote
gs7_11 Posted June 10, 2018 Posted June 10, 2018 (edited) I've always run mine in like a normal road bike, but over a shorter period - maybe 200 miles? Start off gentle, build up when it feels like its ready. Make sure you're pushing it a bit further every time you ride it till when it's ready give it WFO a few times. Plenty of up and down the years, don't cruise. Then change the oil. Always had good compression, long life and have stripped and rebuilt engines with Wiseco kits run in like that and they look good and are in spec. Edited June 10, 2018 by gs7_11 Quote
Gixer1460 Posted June 10, 2018 Posted June 10, 2018 2 hours ago, Duckndive said: I read someware Roger had posted "may have been faceache" Assemble the pistons into "DRY" bore and by the time you have dialled in the cams the rings will be seated...... Works for me... Oooooh - that takes a leap of faith ! Mind you a lot of Roger's engines get run in after less than 8 seconds LOL! Quote
Swirl Posted June 10, 2018 Posted June 10, 2018 Interesting is this just wiseco's or all forged pistons, I've a rebuilt motor to run in soon Quote
Spamwood Posted June 10, 2018 Author Posted June 10, 2018 Bear in mind this is prodominatly a road bike, not a race bike, so I'm keen to run it in as well as I can. 1 Quote
Duckndive Posted June 10, 2018 Posted June 10, 2018 1 hour ago, Gixer1460 said: Oooooh - that takes a leap of faith ! Mind you a lot of Roger's engines get run in after less than 8 seconds LOL! The theory is that new rings on a dry bore will bed in a few rotations of the engine.... Mate of mine used to build Ford V8 F one engines why back when and they went straight on Dyno at 8K Quote
gs7_11 Posted June 10, 2018 Posted June 10, 2018 19 minutes ago, Duckndive said: The theory is that new rings on a dry bore will bed in a few rotations of the engine.... Rings ok. What does it do to the bores? Quote
Duckndive Posted June 10, 2018 Posted June 10, 2018 19 minutes ago, gs7_11 said: Rings ok. What does it do to the bores? The Bore should be a honed "to size" finish....the correctly gapped rings on the pistons do the sealing once matched to the bore... Sorry I don't buy the running it in gently plot......and never had a problem.... Quote
gshub Posted June 10, 2018 Posted June 10, 2018 (edited) What I did with my Gs1085 was "Roger told me "to do ride it for 50ish miles check for no leaks re torque head down and ride like you normally do since I fitted oil cooler it never used a drop of oil I just have a big bore kit basically stock cams .... Edited June 10, 2018 by gshub Quote
gs7_11 Posted June 11, 2018 Posted June 11, 2018 22 hours ago, Duckndive said: The Bore should be a honed "to size" finish....the correctly gapped rings on the pistons do the sealing once matched to the bore... Sorry I don't buy the running it in gently plot......and never had a problem.... I didn't mean gently overall, sorry if that came across that way. The debate on this is interesting, and I also don't think you should take 1000 miles to run a bike in. However I don't fully accept the arguments often put forward on the other side either, particularly with regard to older stuff. The claims don't hold up under scrutiny IMO. Quote
Sheep Posted June 11, 2018 Posted June 11, 2018 I ran mine in,albeit MTC pistons,for around 300 miles.No thrashing/red lining/uphill in high gears etc,just rode it sensibly,on cheapo mineral oil...however,it did burn a little oil on start up so I was worried I had been too careful but a weekend giving it the beans last year at Donington 'completed' the process and now all is good in the hood. 1 Quote
CockneyRick Posted June 12, 2018 Posted June 12, 2018 Really is hit & miss from what i've read. I did as Roger said on my 1085 Wiseco's yet 800+ miles & a few years on, mine still smokes! Oh and rattles like me dad on his Woodbines 1 Quote
370steve Posted June 12, 2018 Posted June 12, 2018 30 minutes ago, CockneyRick said: Really is hit & miss from what i've read. I did as Roger said on my 1085 Wiseco's yet 800+ miles & a few years on, mine still smokes! Oh and rattles like me dad on his Woodbines Did Roger build your motor? Quote
370steve Posted June 12, 2018 Posted June 12, 2018 I had two engines bored by roger, both smoked!!! 1 Quote
CockneyRick Posted June 12, 2018 Posted June 12, 2018 Not me being a pussy then! Although starter clutch is the usual nightmare. Thudding all the time. Gonna do the Ign advance trick once the Drag bike is finished. Quote
Gammaboy Posted June 12, 2018 Posted June 12, 2018 I gave mine a hiding as a run in... seems to be fine. 1 Quote
Swiss Toni Posted June 13, 2018 Posted June 13, 2018 The old adage used to be, 'Run it in gentle ... and it'll be slow'. 'Run it in hard ... and it'll be fast!' They say if you saw what Yamaha did to brand new R1's to seat the rings, your toes would curl! Quote
Blower1 Posted June 13, 2018 Posted June 13, 2018 The first 50 km´s are the most critical/important to running in pistons. A lot of moderate accelerating and motor braking. Then next 300 km normal riding without any crazy revving. After that oil & filter change and that's it. Quote
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