clivegto Posted October 7, 2019 Posted October 7, 2019 Could run another jokey pulley on the inside of the belt. Not the best solution but it would work. Quote
Nickel Posted October 7, 2019 Author Posted October 7, 2019 Yes, also a possible, but that would be more work, than using a bigger pulley on crank. I think a shorter belt could also cost not much. Quote
clivegto Posted October 7, 2019 Posted October 7, 2019 4 minutes ago, Nickel said: Yes, also a possible, but that would be more work, than using a bigger pulley on crank. I think a shorter belt could also cost not much. Get shorter belt easiest solution. Quote
Gixer1460 Posted October 7, 2019 Posted October 7, 2019 10 minutes ago, clivegto said: Get shorter belt easiest solution. Doesn't need to be special - I got mine for a modified car's auxiliaries drive from Medway Belts - http://www.dunlopbtl.com/downloads/Dunlop BTL - Timing Belts.pdf - last ones I bought were £6 or 7 each. Quote
Gixer1460 Posted October 7, 2019 Posted October 7, 2019 1 hour ago, Nickel said: One issue I can see is belt tooth to tooth contact over the tensioner. The untensioned side will flap about - its scary how much they do - didn't occur with the original Sims & Rohm due to the poly Vee belt used. Obviously a bit of wear and increased tension makes the situation worse - certainly a shorter belt and getting the tensioner at least 3x the difference? Quote
Gixer1460 Posted October 7, 2019 Posted October 7, 2019 1 hour ago, Nickel said: One issue I can see is belt tooth to tooth contact over the tensioner. The untensioned side will flap about - its scary how much they do - didn't occur with the original Sims & Rohm due to the poly Vee belt used. Obviously a bit of wear and increased tension makes the situation worse - certainly a shorter belt and getting the tensioner at least 3x the difference? Quote
Nickel Posted October 7, 2019 Author Posted October 7, 2019 I hope to fix this issue with a shorter belt, or with a bigger pulley. Actually with tensioned belt the tooth get in contact. Quote
ElBlandito Posted October 9, 2019 Posted October 9, 2019 Very excited to see this one together! Happened to stumble across this video while searching Youtube. Please promise us one thing, you will not do this to the bike once you are finished! (RIP TO THE HEADPHONE USERS) Quote
Nickel Posted October 10, 2019 Author Posted October 10, 2019 Put the motor into the frame to check the situation with the carb. The plan is to use a Mikuni HSR. Carb colides with the bottom of the gas tank. Have to make a cutout in the bottom to get the needed space. Afterwards drilled a flange for the engine case to hold a shaft sealing ring. With a belt with 3 teeth less than the actual one, I will have enough clearance between both sides of the belt. I realy would like to know what carbs they used in the old Sims and Rohm kits..... I know it's also Mikuni, but no idea what type. More work to do than expected. 6 Quote
dupersunc Posted October 10, 2019 Posted October 10, 2019 That's a Mikuni phh carb. Japanese version of a Weber DCOE. Quote
Maggotbreath Posted October 11, 2019 Posted October 11, 2019 Right on dude, new belt looks great! No doubt the HSR is the way forward, 42? Quote
Nickel Posted October 11, 2019 Author Posted October 11, 2019 Okay, thanks for the info. Never heard about PHH carbs. Have done a little bit research. Only found info and pictures of carbs with two throttle bodys. The connection flange on the charger seams to be for a carb with one throttle body. Yes it's a HSR 42. Made good experiences on my Turbo Kwakisaki with this carb. Quote
dupersunc Posted October 11, 2019 Posted October 11, 2019 (edited) The phh was a twin choke carb. Edited October 11, 2019 by dupersunc Quote
Gixer1460 Posted October 11, 2019 Posted October 11, 2019 1 hour ago, dupersunc said: The phh was a twin choke carb. It was indeed. There is one pish poor picture in an early edition of a Joe Haile Turbo Bike magazine. Not a bad carb but largely unheard of in the 'West' LOL! If you are tight for space - a Weber DCOE 40 would fuel it perfectly and it's quite shallow like the PHH ? Quote
Blubber Posted October 11, 2019 Posted October 11, 2019 re - belt: You are obviously using a "880 - 8m" probably even a HL version "Hoch Leistungs" or high performance for most of us. You now have 110 teeth.. if you want 3 teeth less: you will end up with the 856 - 8M HL from the Optibelt omega series. This one has 107 teeth (and working length 856) Quote
Nickel Posted October 11, 2019 Author Posted October 11, 2019 A good mate has pulley with 32 teeth left. So I will go that way, before ordering a new belt. But thanks for that hint @Blubber. I will have to have a closer look to the situation with the carb. It's very tight. If I have the carb centered to the intake of the charger in the same angle as the charger intake, the carb intake will collide with the braket of the seat. In my opinion it would be better to have the carb oriantated upright. Ordered a rubber manifold for the carb today. After receiving it I will try to drill and mill an adapter flange. Thanks for your help guys. Great to be part of this amazing community. 3 Quote
Nickel Posted October 22, 2019 Author Posted October 22, 2019 Pressed the milled extensions into the swingarm. Now ready for welding. 5 Quote
Fatmama Posted December 24, 2019 Posted December 24, 2019 Absolutely stunning work. Wet dreams stuff. Following. Quote
GV1390 Posted April 9, 2020 Posted April 9, 2020 This thing is so rad. Going to be following closely on this! Keep up the good work, man. Quote
Reinhoud Posted April 10, 2020 Posted April 10, 2020 With this setup with supercharger, is the power coming in like normal, but a lot more? I understand that when you use such through turbochargers the powerdelivery is more like a 2 stroke.. Quote
Reinhoud Posted April 10, 2020 Posted April 10, 2020 (edited) That carbie, does the slide run over bearings? Slide in 2 parts? I had a 42mm carby, Mikuni used on Harleys, on my DR500, awesome carbies, ran really well, that acceleration pump works well too. Edited April 10, 2020 by Reinhoud Quote
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.