Author Topic: Yamaha YZ125 rear wheel offset  (Read 7362 times)

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Offline Lozza

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Re: Yamaha YZ125 rear wheel offset
« Reply #30 on: February 15, 2013, 02:33:43 pm »
I know guys who were allegedly getting 32HP on e85 in Superlights (Honda H100 engine).  I'd believe it too.  They were blowing everyone else into the weeds.  They were spinning it to 14,000 RPM though and regularly eating small end bearings.  The H100 has a longer stroke and smaller bore than the DT100.

I have EGT, CHT and EGO for it.  Running a Mychron 4 2T data logger and dash with all the fruit.

I'm also looking into whether or not I can graft a Yamaya KT100J head onto it.  The bolt pattern is almost identical (haven't measured one yet) to the DT100 head and it has more cooling fins.  And being a dedicated race head, presumably it's up for a bit more torture than the RT100 head I have on it.

Except when all the big HP buckets get put on a proper dyno they all read way way less,e85 isn't allowed in buckets either  ;) Last 3-4 years there has been no H100's near the front, and if they are Lindsay McKay's been riding it
Jesus only loves two strokes

ChrisACT

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Re: Yamaha YZ125 rear wheel offset
« Reply #31 on: February 15, 2013, 06:30:48 pm »
Yes.  That H100 went well, didn't it?   8)  He used to outrun all but 2 or 3 of the Motolites.

I didn't think e85 was specifically outlawed until it had been available for a year or two.  I was considering it as an option.
« Last Edit: February 15, 2013, 07:34:03 pm by ChrisACT »

Offline Lozza

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Re: Yamaha YZ125 rear wheel offset
« Reply #32 on: February 15, 2013, 08:46:06 pm »
Lindsay's bike is a 125 and water cooled running in P5 125. Fuel is as per the GCR's and you can only have 100 RON fuel and e85 is 115 RON. It's a good alternative to methanol, tuning is half way between ULP and methanol.
Jesus only loves two strokes

ChrisACT

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Re: Yamaha YZ125 rear wheel offset
« Reply #33 on: February 15, 2013, 09:15:07 pm »
I can't say I remember them ever checking fuel at a PCRA meet.  Mind you, I was told by the engine builder that they got that HP out of it on a dyno on e85.  In no way am I accusing anyone of cheating in a race.
« Last Edit: February 15, 2013, 09:23:08 pm by ChrisACT »

Offline Lozza

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Re: Yamaha YZ125 rear wheel offset
« Reply #34 on: February 16, 2013, 07:47:10 am »
Marcus de Caux has this takes 2 min to test and use of e85 was uncovered.

http://www.digatronfueltester.com/
Jesus only loves two strokes

Offline micks

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Re: Yamaha YZ125 rear wheel offset
« Reply #35 on: February 16, 2013, 12:38:22 pm »
pcra have check fuels at a meet ask the phantom next time you see him.

Offline Lozza

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Re: Yamaha YZ125 rear wheel offset
« Reply #36 on: February 16, 2013, 04:15:45 pm »
 ;D
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ChrisACT

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Re: Yamaha YZ125 rear wheel offset
« Reply #37 on: February 17, 2013, 09:39:28 am »
I think Marcus must have acquired the fuel tester after I stopped racing with them.

Offline VMX247

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Re: Yamaha YZ125 rear wheel offset
« Reply #38 on: February 19, 2013, 10:46:18 am »
A friend is off to the salt very soon actualy everyone is pumped after 2 yrs of being washed out.

for those interested
Todays News  8)
http://www.abc.net.au/news/2013-02-19/racers-make-speed-assault-on-salt/4526670
home base  ;D
http://www.dlra.org.au/forum/index.php
Best is in the West !!

Offline Lozza

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Re: Yamaha YZ125 rear wheel offset
« Reply #39 on: March 14, 2013, 09:30:13 pm »
Jesus only loves two strokes

ChrisACT

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Re: Yamaha YZ125 rear wheel offset
« Reply #40 on: March 15, 2013, 09:04:10 am »
http://www.apriliaforum.com/forums/showthread.php?247737-RS-250-Land-Speed-bike
some reading for you Chris  ;D

Thanks, Lozza.  I've been following his progress on the DLRA forum.  There are some great machines being put together.  Mine is a bit of a laugh by comparison.  But it's a start.