|
Post by ThaiGyro on Apr 1, 2016 7:42:39 GMT -5
My DSR was an Omni-Fab Cheetah SR-1. When I bought it, had Yamaha 1000 with carbs and about 175 hp. When I sold it, it had a Suzuki 1000 with FI and dyno power at 202 hp. Of course, I had crashed it and therefore had forced upgrades. Guessing it peaked near 155 mph, but I know it pulled 4.1 G's in the right places. Paint was by me...crash damage was by me...broken engine from over revving later that day? By me.
|
|
|
Post by stepthrutuner on Apr 1, 2016 9:04:30 GMT -5
Thanks for sharing that. Used to go to a lot of SCCA events. Always appreciated those tiny, cycle engine DSRs. Hilight was probably seeing Bobby Rahal in FB cutting laps consistently within 0.1 sec. of each other while being fastest on an airport course in Arkansas. My interests evolved to Pro Rally and I prepped three Datsun 510s to varying degrees, one turbocharged. I practiced daily and got pretty good but never competed.
|
|
|
Post by ThaiGyro on Apr 3, 2016 7:28:25 GMT -5
Hi StepTuner,
I too got to se Rahal in FB and Prototypes...at Sears and Laguna Seca. Baad ass! If you like the Datsun's...you might enjoy my Nissan project. A Y10/N14 based chassis that is in pickup truck form here in Thailand. Mine will have AWD and be around 200 to 225hp. I am calling it a Nissan NV VZ-R.
Can Pm you details and ideas if you'e a Nissan nut.
Jay
|
|
|
Post by ThaiGyro on Apr 25, 2016 8:55:47 GMT -5
Someone asked for old racing pictures...only found one from '76 or '77 on a Yamaha TA125B. This is from Riverside Raceway. Start of the race, entering turn one. Look for Black/Red/Orange/Yellow. Not a great picture of the bike...
|
|
|
Post by 'O'Verse on Apr 25, 2016 13:10:23 GMT -5
Welcome by the way. Not to go off subject, but are they still racing and modding the Honda sonic pro's over there in Thailand. If so... Is there any way you can find out what there doing with the 150 4 stroke engine that makes them rip so hard.
|
|
|
Post by ThaiGyro on Apr 28, 2016 6:38:22 GMT -5
I am sure that all Japanese twin tube, under-bone bikes are following what the racers have done. Here that is increasing displacement, bigger cams, and better gearing. The Thai versions of Honda and Yamaha both went to 150CC with a bit more than 11:1 compression and fuel injected six-speeds. Bump the compression higher even and the 13,500+ rpm's would provide some fun. The Suzuki and Kawasaki are similar, but I don't know the details. I think they are all in the 16.5 to 18 hp range, with DOHC setups. Should be 20+ in the right hands...especially with fuel injection and better ignition mapping.
I do know that they all have upgraded suspensions and brakes as well. Everything is liquid cooled. It's all about A-F and exhaust flow.
I find it interesting that there are still many 2 stroke under-bone bikes here that can either keep up or in many cases smoke the newer 4T's. I saw both a 125cc Kawi and a T135cc Yamaha (4T) having a great time at the race track, with no other four stroke able to keep up. The Kawi was faster than the Yamaha! Very skilled riders helps too! They were many seconds ahead of the Honda and Suzuki 150's. Not a good comparison, as I have no idea how any were modified, but were all racing in the 150cc class.
I am sure I can poke my nose into a few shops or pits and find more details.
|
|
|
Post by 'O'Verse on Apr 28, 2016 22:35:17 GMT -5
I am sure that all Japanese twin tube, under-bone bikes are following what the racers have done. Here that is increasing displacement, bigger cams, and better gearing. The Thai versions of Honda and Yamaha both went to 150CC with a bit more than 11:1 compression and fuel injected six-speeds. Bump the compression higher even and the 13,500+ rpm's would provide some fun. The Suzuki and Kawasaki are similar, but I don't know the details. I think they are all in the 16.5 to 18 hp range, with DOHC setups. Should be 20+ in the right hands...especially with fuel injection and better ignition mapping. I do know that they all have upgraded suspensions and brakes as well. Everything is liquid cooled. It's all about A-F and exhaust flow. I find it interesting that there are still many 2 stroke under-bone bikes here that can either keep up or in many cases smoke the newer 4T's. I saw both a 125cc Kawi and a T135cc Yamaha (4T) having a great time at the race track, with no other four stroke able to keep up. The Kawi was faster than the Yamaha! Very skilled riders helps too! They were many seconds ahead of the Honda and Suzuki 150's. Not a good comparison, as I have no idea how any were modified, but were all racing in the 150cc class. I am sure I can poke my nose into a few shops or pits and find more details. Thanks thaigyro. Yeah I've been watching some you tube videos of the Honda sonic in Thailand and Vietnam 150cc class doing 180kph in under 11.0 seconds. 1/4 mile I think. 6 speed 4 strokes. That would be great if you have a chance to get a little more info on the subject. Like you said probably 150cc modified to over 200cc or something. But man there quick.
|
|
|
Post by ThaiGyro on Jun 10, 2016 17:27:04 GMT -5
Just found a Honda race bike picture on my FB pages... This was the most fun I have had on the racetrack...
|
|