We have about 6 weeks to get this POS basket case DS7 prepped and ready to win a 6hr endurance race at the local kart track.
(https://i.ibb.co/hXXqSBY/5-FF81-A5-B-0-DE9-4-CC8-974-C-427-FA05-B092-F.jpg) (https://ibb.co/GsshqWH)
Basically, it needs everything.
Plan so far is:
RD350 engine with Garrett GRA400C Amner crank rebuild, head skim/squish, lite porting, intake mod for Vforce YZ85 reeds. Cast ProX pistons.
Mikuni VM30's with UNI pods
HPI ignition
Older MC Millennium Pipes
Shouldered aluminum rims
Stock caliper w/ss lines and 13mm master
Chinese ebay "cafe racer" seat
Tarozzi rearsets from FFTP
Works shocks, rebuilt forks with fancy springs.
etc.
(http://portlandkarting.com/site_files/images/mac_track_new.jpg)
Basics of the race:
6hrs total. 3hrs clockwise, 3hrs counterclockwise. Track is 6/10th of a mile. Fast guys do like 400+ laps.
1-3 man teams. Grid is 16 bikes max.
3 classes: Vintage <550cc, <1985. Modern <250cc any year. Flyweight <185cc and year.
That sounds like a blast. I'm not sure my DT100 racer would last that long. It does OK on the kart track though :) I waited until about a month before I needed to take it to Deals Gap to start on it. It was a field find and needed a complete rebuild. I'm sure you'll be OK.
Man I really wish events like this happed out my way...
You get no rest on that track...you might get a couple of breaths on the straight! Fun and tiring at the same time!!
Word to the wise...use race gas and scrub off coating (Pro-X) at the piston measurement point and run no less than .0025 piston to wall clearance.
25:1 on a good race premix oil.
Post pics of the build!
Chuck
crap, double post
Quote from: SUPERTUNE on April 22, 2019, 05:20:31 AM
You get no rest on that track...you might get a couple of breaths on the straight!
That's for sure! Not much in life makes you have to think so fast.
Nathan, you'd definitely have a good time. Aren't there any kart tracks halfway near you?
Quote from: retaRD on April 22, 2019, 12:48:37 AM
Man I really wish events like this happed out my way...
*sigh
Me too...
LeMans start.
(https://i.ibb.co/TWYgrCn/74656636-94-CF-406-B-9-E07-B9025-C4252-D0.jpg) (https://ibb.co/wcBzYvb)
Last year's Vintage winner. 1982 RM250
(https://i.ibb.co/8NwhZ1Q/38568-BD9-B881-43-A2-8809-9604-AACF581-B.jpg) (https://ibb.co/Ntq4BcG)
Quote from: Jim on April 22, 2019, 09:07:27 AM
Nathan, you'd definitely have a good time. Aren't there any kart tracks halfway near you?
The closest small course I can think of is Herrin Compound, but that's not all that close.
There's also little Tally..
I'm not aware of any "legit" kart tracks near me, most are the bumper bowling style tourist kart tracks in Pigeon Forge..
I learned how to race on a 1/4 mile go kart track....... :righteous:
(https://live.staticflickr.com/7887/47075035222_87b7022154_o_d.jpg)
Looks like VIR or CMP are your only options
Unless you wanna go roundy round on a clay oval. :harley:
Quote from: retaRD on April 22, 2019, 12:16:30 PM
Quote from: Jim on April 22, 2019, 09:07:27 AM
Nathan, you'd definitely have a good time. Aren't there any kart tracks halfway near you?
The closest small course I can think of is Herrin Compound, but that's not all that close.
There's also little Tally..
I'm not aware of any "legit" kart tracks near me, most are the bumper bowling style tourist kart tracks in Pigeon Forge..
But, Little Tally is bigger now than when it got it's name...
Way back I geared way down and started in 2 gear off the starting line.
Won most of the races there by doing that...
Chuck
Yeeeeew!
Parts are here!
Thanks for all your hard work Garrett!
(https://i.ibb.co/V23tRHn/02-A600-A9-8-FC5-477-E-B3-AD-0-BFA062-F8989.jpg) (https://ibb.co/cDx10bf)
(https://i.ibb.co/K6sC3QT/B7366-C92-041-A-4979-B5-D8-67-D49-AA20862.jpg) (https://ibb.co/G7Mgb1z)
(https://i.ibb.co/Wx1NBgb/B03-BCC0-E-816-B-40-DB-B42-B-578-DA70-D6-B2-A.jpg)
(https://i.ibb.co/jkjHLZC/B007-CF53-BFAB-4-F19-9519-493-BF0-F8-B267.jpg)
(https://i.ibb.co/nw1M3yf/6-BEE31-FC-0-E3-A-4-D02-A1-E7-25-B5-ACEEEADC.jpg)
(https://i.ibb.co/mcC8YGH/CE58-C77-D-FBFA-4-F4-B-B1-C2-AC69-EE9-F4-F1-E.jpg)
Had a very productive Saturday night.
(https://i.ibb.co/TmXwqhg/BD455-AD0-5-F5-B-4-CF9-9332-0-BE349-ED0002.jpg)
(https://i.ibb.co/F67WP9t/DA08237-A-4-F88-40-A3-8-F83-88-D258006-E60.jpg)
(https://i.ibb.co/7Knsbmf/066-F8-F96-04-C0-4-A19-ACF4-C325-A1-BD8-FBC.jpg)
But ran into a snag. VM30 don't fit,
(https://i.ibb.co/ysqv3Pg/209-FF2-E7-E307-4-A05-82-F5-641-B375-CB2-E1.jpg)
(https://i.ibb.co/bLSqK0H/A28-C80-B6-F9-AE-4-AE0-BF00-BE10-A1-F5-C0-D1.jpg)
Dammit you guys are having fun :taz: :taz: :taz: :taz:
Quote from: retaRD on May 12, 2019, 04:55:43 AM
Dammit you guys are having fun :taz: :taz: :taz: :taz:
It's true.
Your killing me with that cheap eBay boost bottle!! Come on Jim!
Quote from: GRA400c on May 12, 2019, 05:23:02 PM
Your killing me with that cheap eBay boost bottle!! Come on Jim!
One of the guys stuck it on there. I dunno where it came from.
We have an LC crossover tube on order
Looks like fun! I really need to stop being lazy, prep my old IT175 roadracer with some friends, and run it!
Looking good! What rim width/tire size are you running?
Quote from: idr5c on May 13, 2019, 06:25:40 PM
Looks like fun! I really need to stop being lazy, prep my old IT175 roadracer with some friends, and run it!
Still got a few weeks 👍
Current state of things:
(https://i.ibb.co/PQMc8W4/4918-F01-C-D9-D6-4-E16-ACF4-46-C78-FEE5-DAD.jpg)
(https://i.ibb.co/1dc6Wpv/5-A43-EA5-F-C135-4-DEE-9560-27-B0-B6-F1930-E.jpg)
Runs great! Needs jetting but feels pretty close. Still needs bark busters, kill switch, safety wire, sliders, number plates, inner fender, gearing detailing, a better clutch lever/perch, and a bunch of other random sh!t.
Credit due to Garrett "GRA400c" Amner, and both of the Gregs at Motor Sports Engineering. Thanks for all your help!
Looking good! :clap: How did you resolve the carb interference issue?
very cool indeed. :metal: make sure theres race footage :vroom:
Use one of these... works fantastic on all my race bike builds and cheap too!
Just buy 2, one for spare.
Chuck
https://www.ebay.com/itm/EZ-QUICK-ADJUST-CLUTCH-LEVER-PERCH-ASSEMBLY-CR-KX-YZ-RM-80-85-125-250-500/362631012439?epid=2098618245&hash=item546e7e2057:g:Qs4AAOSwzVVcwJ70:sc:USPSFirstClass!33764!US!-1 (https://www.ebay.com/itm/EZ-QUICK-ADJUST-CLUTCH-LEVER-PERCH-ASSEMBLY-CR-KX-YZ-RM-80-85-125-250-500/362631012439?epid=2098618245&hash=item546e7e2057:g:Qs4AAOSwzVVcwJ70:sc:USPSFirstClass!33764!US!-1)
Quote from: SoCal250 on May 20, 2019, 12:33:25 PM
Looking good! :clap: How did you resolve the carb interference issue?
Had to cut the drain nipple and boss off the carb bowl and clearance the case. Did both with a dremel and a carbide cutter bit.
Current state of things as of last night.
Lots of rips around the block. Will be taking it to the industrial wasteland guerrilla test track this weekend to work on jetting, brakes and suspension tuning.
(https://i.ibb.co/Th64X50/F9-E0-A54-B-C95-E-46-D4-9-A21-3-A9-C57-B9-BB7-D.jpg)
Jim, what cans are those on your pipes? I have a set of home rolled chambers that have the same ones.
Quote from: Seizer on May 24, 2019, 06:08:32 PM
Jim, what cans are those on your pipes? I have a set of home rolled chambers that have the same ones.
Dunno? I was assuming they are Moto Carrera?
(https://i.ibb.co/8224z7p/1-AB4-E75-A-9170-4-E10-98-FF-7-C6698438-F9-A.jpg)
Maybe my home rolled are using MC cans 🤷🏻♂️
Well, that was a helluva lot of fun.
I only made the last 10 minutes of practice on Saturday afternoon. The bike was running strong, but the brakes were crap. After the saga of my TDR250 brakes, it was obvious by feel the master was too big for the four piston Brembo caliper we ended up with after the stock caliper and disc of unknown origin failed to play nice together. We swapped out the Brembo master for the MikesXS one and after bleeding it out, shut down for the night.
Burgers, dogs, a small bonfire in the Weber kettle, a few twelvers of Ranier and lots of new and old friends were the evening activities before camping at the track.
7am wakeup, 8am tech and registration, 9am riders meeting and 9:30-10am practice. Brake felt MUCH better with the slightly smaller 13mm master.
Travis got the LeMans start Vintage holeshot from 11th on the starting grid out of 18 bikes. He was in third position coming out of turn one.
Our Vintage class consisted of four bikes: a clapped out GPZ550 with one very fast pro racer and two fast clubmates of mine, a SR500 with three fast riders without much race experience, an even more clapped out TS250 with one very fast guy and two good riders ... and us on the RD350. Three old fat dudes.
(The minibike class was a mix of Ohvale 160s, a CR85 on 17's, a few Groms, and a few Kymco K-Pipes. Modern class was a KLR650(!), Ohvale 190s, a vj21 RGV250, and a couple Ninja 250s)
Anyway, the GPZ550 was pretty fast, and the skilled riders took them to the lead pretty quickly. We had the SR and TS handled without too much effort. The GPZ was fast, but was plagued with two or three big crashes that chewed up a bunch of laps and got us out in front.
Right before halftime one of our riders went down on the left side and mangled the shift gear. We cobbled together a repair out of random spare parts during halftime, and luckily we didn't lose any laps.
At hour five, our fuel tank split a seam and during a rider swap we noticed it dumping fuel on the hot engine. We pulled the tank and patched it up with JB Quick, but lost about 20 laps in the process.
Final finish was SR500 in first, TS250 in second and us in third.
Total for the day was 6 hours racing, 348 laps, 208.8 miles, 13 gallons of gas and a whole shitload of fun!
(https://i.ibb.co/KmqZnxn/Bol-pack.jpg)
(https://i.ibb.co/n6mJ1k2/Travis-Bol.jpg)
More pics can be found here: https://drive.google.com/open?id=1u7EgWI7z8lNNDdbOQVQVfgx5OwDE7RHn
Sounds like a heap of fun
https://www.youtube.com/embed/S00ewG-9M1E
Massive credit due to Garrett GRA400c Amner.
No way we could have pulled this off without him. Garrett helped source parts, skimmed/doweled/o-ringed the head, ported/bored/and modded the cylinders to fit the Vforce reeds, rebuilt and trued the crank, sourced/milled/jetted the carbs, made us a custom throttle cable, milled a custom disc adapter, and a bunch of other random sh!t we needed to get this thing around the racetrack.
Great prices, great communication and lightning fast turnaround! Thank you Garrett!
:cheerleader: Awesome!
Plans for doing it again next year? You've got the platform and it's already sorted. :vroom:
Quote from: idr5c on May 13, 2019, 06:25:40 PM
Looks like fun! I really need to stop being lazy, prep my old IT175 roadracer with some friends, and run it!
You would have done well!
Small bore class was won by a Kymco K-Pipe :whistle:
It was gutless and slow as sh!t on the straights, but on sticky roadrace slicks it was fast thru the corners.
(https://pictures.topspeed.com/IMG/crop/201803/2013-kymco-k-pipe-3_1600x0w.jpg)
Quote from: SoCal250 on June 08, 2019, 12:21:14 AM
:cheerleader: Awesome!
Plans for doing it again next year? You've got the platform and it's already sorted. :vroom:
We will see, Russ. It was a ton of fun.
The bike is actually owned and the build was financed by a guy on a rival team. He gave our team the option of building an RD350 or GPz550. We chose the RD. He paid for all the parts and machine work, and we did all the legwork and labor.
A few weeks before race day, he decided to run the GPz as well.
They would have likely won it if they had managed to stay on the track.
Thanks for the awesome words Jim! Was a lot of fun helping you guys out and a great feeling with the first (race) engine out the door with such great success! Very exciting for me.
Post up some videos so we can here it sing it's song!
Garrett
Quote from: GRA400c on June 09, 2019, 10:49:00 AM
Thanks for the awesome words Jim! Was a lot of fun helping you guys out and a great feeling with the first (race) engine out the door with such great success! Very exciting for me.
Post up some videos so we can here it sing it's song!
Garrett
I feel like we might know each other..
Man this is the kind of racing I yearn for here. Looks like y'all had a ball.
Where abouts do you live? I'm in Vancouver wa just above Portland.
Garrett
Quote from: GRA400c on June 16, 2019, 08:10:43 PM
Where abouts do you live? I'm in Vancouver wa just above Portland.
Garrett
retaRD Nathan is just outside Knoxville TN.
Interestingly, he grew up in San Diego with Travis who is on the Kart Track Racer team.
The more you know.
Video from race day!!
https://youtu.be/dcKS1wM16Uw
Braaap to the top!
LOL, forgot to mention ...
I ran the last leg of the race ... about 45 minutes on the bike til the checkered flag.
During the last few laps, I started noticing the rear end feeling loose. I thought the swingarm bushings were bedding in or something and just kept it pinned WFO.
Last week at our club meeting, we were all standing around poking at the bike and found ...
TWELVE BROKEN SPOKES IN THE REAR WHEEL!!
Wow, that's scary.
That's a ton of fun! :metal: :celebrate:
Hi,
Can u share the source of fork brace ?
Thanks
Akhilesh
Quote from: Akhil on June 23, 2019, 01:36:37 AM
Hi,
Can u share the source of fork brace ?
Thanks
Akhilesh
Correct me if I'm wrong but it looks like the RSWRacing.com fork brace. I've got one on my RD and it works great. Looks like they just increased the price though...
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