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urgent help needed!!

 
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rg250 screamer



Joined: 02 Mar 2008
Posts: 84
Location: dorset

PostPosted: Tue Jul 08, 2008 4:45 pm    Post subject: urgent help needed!! Reply with quote

iv just taken the head and barrells of my rg250 "special fairingless type thingy" (frame is away being powder coated so i wanted to refresh the engine) to find that my 1mm oversize pistons have very small chunks missing around the pin that holds the rings in the right place. the barrels have matching scores too, so i spoke to a few people who seemed to think suzuki only made up to 1mm oversize, does any body know any different or am i in need of another set of barrells and pistons???? Confused any help would be greatly appreciated, ow its a mk3 aswell
cheers
aden
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Crofty
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Joined: 19 Feb 2008
Posts: 331
Location: Stoke-on-Trent

PostPosted: Tue Jul 08, 2008 5:57 pm    Post subject: Reply with quote

pattern parts upto 2mm......makes it about 266cc i think!!

http://www.patternparts.net/stock_refine.asp?model=101&category=22&model_go.x=10&model_go.y=7

1.5mm too........gives a bit of slack for next time........it is a Mklll is it?
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rg250 screamer



Joined: 02 Mar 2008
Posts: 84
Location: dorset

PostPosted: Tue Jul 08, 2008 7:40 pm    Post subject: Reply with quote

your a star mate i was fearing the worst! i was thinking of sending the barrels to stan stevens for the rebore, any thoughts/suggestions??
cheers
aden
ps yeah its a mk3!!
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Crofty
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Joined: 19 Feb 2008
Posts: 331
Location: Stoke-on-Trent

PostPosted: Tue Jul 08, 2008 9:07 pm    Post subject: Reply with quote

Try also
http://www.bitzforbikes.co.uk/myproducts.php?year=509&BikeID=289
In Rochdale, I doubt the quality is too great (thats just how pattern parts are these days...Chinese tat probably), but with good oil should last.
A 1.5mm oversize should give you 261.2cc....might be a noticable gain on power and torque? Stick with the 1.5mm oversize so you have a chance of a future rebore. Any local engine builder/bike dealer should be able to sort this out, however Stan can do a bit of port work for you to try get a bit of a mid range boost....
http://www.stanstephens.com/street.htm
£100 for stage one tune, £200 for stage two, and charges £25 per pot for rebore.....all plus VAT, something to consider?
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rg250 screamer



Joined: 02 Mar 2008
Posts: 84
Location: dorset

PostPosted: Wed Jul 09, 2008 6:45 am    Post subject: Reply with quote

im actually doing the bike up to sell so i was reluctant to spend to much money but something like a rebore is unavoidable, toll or not to sell this bike has been my baby for about 2 years so i just couldnt bare to wack it all back together and flog, like many people have been telling me to!! Evil or Very Mad
thanks for your help its really appreciated
aden
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Crofty
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Joined: 19 Feb 2008
Posts: 331
Location: Stoke-on-Trent

PostPosted: Wed Jul 09, 2008 5:13 pm    Post subject: Reply with quote

Rare thing....man with a conscience!! Simple rebore and small ends to freshen it up, or see if you can find decent used barrels and pistons for less money (unlikely Sad ).
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Kickstart



Joined: 26 Apr 2008
Posts: 59

PostPosted: Mon Jul 14, 2008 10:15 am    Post subject: Reply with quote

Hi

Suspect someone like PJ Engineering could make and insert a new cast iron liner so that you could use standard size pistons.

All the best

Keith
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rg250 screamer



Joined: 02 Mar 2008
Posts: 84
Location: dorset

PostPosted: Mon Jul 14, 2008 6:03 pm    Post subject: Reply with quote

thanks for your help mate but as luck would have it iv sourced a 1.5mm o/s pair im getting quite excited for the rebuild now! all my bolts have gone for plating and i chose all the colors for powder coating! will post some pictures when it all arrives
aden
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Crofty
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Joined: 19 Feb 2008
Posts: 331
Location: Stoke-on-Trent

PostPosted: Mon Jul 14, 2008 8:43 pm    Post subject: Reply with quote

WE LOVE PICS!! They paint a thousand words.....
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