RGV Challenge

scooble · Post by **scooble** » Wed Aug 26, 2009 9:28 am

are the kips ports made taller/wider?
If so, what are the recommended dimensions?

TwoStroke Institute · Wed Aug 26, 2009 11:49 am

The rubber bung covers a case bolt.The cases are basicaly the same as the production RS 250, except for the o-ring base 'gasket'

mj43 · Post by **mj43** » Wed Aug 26, 2009 8:38 pm

Sheik Yerbouti wrote:
Just out of curiosity, what was the squish before you set it up properly? Says a bit about production tolerances

1.3mm

mgtkr1 · Post by **mgtkr1** » Wed Aug 26, 2009 10:46 pm

mj43 wrote:
Sheik Yerbouti wrote:
Just out of curiosity, what was the squish before you set it up properly? Says a bit about production tolerances
1.3mm

you could run a std bike on lager!!!!

TwoStroke Institute · Sat Oct 31, 2009 12:24 pm

Whilst in the UK RGV world an on-line mass debate rages about which GP rider is the anti-christ.....................

Been making some progress down here.
Pretty much a standard cylinder/cases with TYGA pipes and aftermarket ignition. About 40 dyno runs later emerged an optimised ignition/pv curve. Crawled our way back to the 'cold case' figure. This dyno reads low (SAE 0.95 correction factor).
Not quite there but on the right track, next is some better cylinders, more comp, reed valves and case work.Wishlist would be a set of my pipes if I could get the bike for a while.

mj43 · Post by **mj43** » Sat Oct 31, 2009 6:30 pm

I know they wouldn't fit the bike, but you might be able to bodge something for a dyno run, might be worth trying a set of KR1S Lomas pipes on the RGV if you can borrow a set.
They work really well on a KR with a raised main exhaust port (about the same height as a stock RGV port and provide masses of mid range 8 to 10k.
As Bore and stroke are the same and as mentioned I think RGV exhaust port height is about right - they might go a long way towards filling the midrange hole (Canyon).

TwoStroke Institute · Post by **TwoStroke Institute** » Sun Nov 01, 2009 1:00 am

We have the 8-9200 hole sussed, all the KR charts have peak @ 10,500 this has peak @11,500, shift this curve 1000 rpm to the left and the difference isn't great.This engine has a CR box(flatshifter too) and the rpm drop in the top 4 gears is to 10,000 from the 11,500 shift point.

JanBros · Post by **JanBros** » Mon Mar 22, 2010 9:38 pm

I thinck you will hold on to your money Marc, there ain't much happening anymore

mj43 · Post by **mj43** » Mon Mar 22, 2010 11:43 pm

It has gone very quiet.
The RGV I am working on is well behind schedule. Hope to have it running over Easter.

Concentrating on next evo of the KR which has some radical changes - we will see if they work.

TwoStroke Institute · Post by **TwoStroke Institute** » Tue Mar 23, 2010 3:12 am

Not in this part of the world. Will have the new Zeeltronic to install and run. Will have similar bits to the graph above so we are expecting to at least match that.

mgtkr1 · Post by **mgtkr1** » Sat Jun 19, 2010 2:25 pm

how is your rgv coming on mark? also what about the latest kr? trackday yesterday for me at cadwell, lapped inside my personal best despite losing 6th gear!! also bike ran very well destroying a majority of mid 90's 750's along the straight. bike ran avgas 50 50 with 160 mains in a homemade airbox. seems to run better on avgas even though ive used v power in the past. need to get the fuelling sorted when getting on the throttle exiting corners. new needles are next. wondering if the std gear linkage been turned around for 1 up 5 down is the problem? or poss the selector forks? need looking at.

TwoStroke Institute · Mon Jun 21, 2010 11:37 am

Zeeltronic results, 12cc heads, tyga pipes, stock cylinders and cases

mgtkr1 · Post by **mgtkr1** » Mon Jun 21, 2010 8:35 pm

tsi, what engine is that? very good curve. that the spec in the bottom of your sig?

the-elf · Post by **the-elf** » Mon Jun 21, 2010 9:15 pm

got to get my baby on the dyno really soon.

TwoStroke Institute · Post by **TwoStroke Institute** » Tue Jun 22, 2010 7:06 am

mgtkr1 wrote:tsi, what engine is that? very good curve. that the spec in the bottom of your sig?

Yeah that's the spec of the RS250 Aprilia(basicaly RGV) with just bolt-on bits. Was about 35 runs and 2 hours work to get us back to the cold case figure. Running pump 98 ULP fuel too. I think my signature is 'crochet & croquet'