DuckNorris Posted October 17, 2021 Posted October 17, 2021 As the title, anyone have any ideas roughly how much an oil boiler 750 lump weighs? Quote
Joseph Posted October 17, 2021 Posted October 17, 2021 (edited) Can't be less than 95 kg i'd say Edited October 17, 2021 by Joseph Quote
DuckNorris Posted October 17, 2021 Author Posted October 17, 2021 6 minutes ago, Joseph said: Can't be less than 95 kg i'd say You may be right, however the weights I've seen for the 1100 on OSS and elsewhere are about 20kg less than that (dry and no carbs). Quote
Joseph Posted October 17, 2021 Posted October 17, 2021 (edited) I seem to remember clearly that there is 8 kilos difference between the 1100 and the 750 engine The 750 frame is lighter, the forks are shorter (i think ?) Different oil capacities etc It all adds up. No way can there be 20 kilos difference just in the engine if you think about it seriously ? Edited October 17, 2021 by Joseph Quote
Joseph Posted October 17, 2021 Posted October 17, 2021 And internet spec sheets, well... Taken from the same website, both '91 : 750 : 1100 : hmm... Quote
dupersunc Posted October 17, 2021 Posted October 17, 2021 3 minutes ago, Joseph said: And internet spec sheets, well... Taken from the same website, both '91 : 750 : 1100 : hmm... The 750 is wetter. Quote
DuckNorris Posted October 17, 2021 Author Posted October 17, 2021 2 minutes ago, Joseph said: 8 kilos difference between the 1100 and the 750 engine The 750 frame is lighter, the forks are shorter (i think ?) It all adds up. No way can there be 20 kilos difference just in the engine if you think about it seriously ? I'm not saying there is 20 kilos difference between the engines, especially not that the 1100 is 20kg lighter than the 750. I was saying that your guess for the 750 seemed high based on what others have said about the 1100. Quote
Joseph Posted October 17, 2021 Posted October 17, 2021 (edited) 14 minutes ago, dupersunc said: The 750 is wetter. In '91 ? I do doubt that quite very much But i guess the might have published the WN specs on the M page on that website ? But point proven : you can't trust internet spec sheets Edited October 17, 2021 by Joseph Quote
Joseph Posted October 17, 2021 Posted October 17, 2021 (edited) 13 minutes ago, DuckNorris said: I'm not saying there is 20 kilos difference between the engines, especially not that the 1100 is 20kg lighter than the 750. I was saying that your guess for the 750 seemed high based on what others have said about the 1100. There is 8 kilos difference between a 750 and 1100. I can't remember where i read that but it was a legit source and i have a good memory for figures. The difference is down to heavier crank, clutch, rods, pistons, sleeves, block in the 1100 A 1998-99 Yamaha R1 is probably the smallest most compact liter bike engine. And on top of it's small size is built with lots of magnesium, nikasil alloy sleeves etc. Very nice stuff. That weighs around 72-75 kilos, and i know that because i had one in my Bond Bug and it was around 15 kilos less that the whole Reliant lump and box. Bear in mind, that the oil boiler was built with absolutely no attention to size or weight, with no special alloys or metals whatsoever, and with steel liners, and a massive gearbox. And 90-95 kilos starts to sound realistic, especially when you try to pick one up by yourself But that is also why, contrary to tge aforementioned R1, the oil boiler is bulletproof and good for 200 000 miles of raw abuse Edited October 17, 2021 by Joseph 1 Quote
DuckNorris Posted October 17, 2021 Author Posted October 17, 2021 8kg difference in the engines would be about right i reckon, but do we take the 1100 as 75kg as online says which makes the 750 67kg or do we use 95kg for the 750 which makes the 1100 103kg. Your reasoning sounds right to me like. The weights I've seen for the 1100 do seem relatively light, just being on OSS lends some weight to the knowledge that's all. Who knows eh! Quote
Joseph Posted October 17, 2021 Posted October 17, 2021 (edited) I sincerely doubt that the 1100 block can weigh as little as a mk1 R1 engine. That is just impossible. But maybe my 90-95 figure is high ? It just feels like a small car engine when you need to shift one Edited October 17, 2021 by Joseph Quote
dupersunc Posted October 17, 2021 Posted October 17, 2021 I'd 75kg for a 750 and 83kg for an 1100 sans carbs is about right. 1 Quote
DuckNorris Posted October 17, 2021 Author Posted October 17, 2021 6 minutes ago, dupersunc said: I'd 75kg for a 750 and 83kg for an 1100 sans carbs is about right. I could get onboard with that. Hopefully someone who has weighed one or the other will be along. Quote
TonyGee Posted October 17, 2021 Posted October 17, 2021 52 minutes ago, Joseph said: the oil boiler is bulletproof and good for 200 000 miles of raw abuse amen to that Quote
clivegto Posted October 17, 2021 Posted October 17, 2021 1052 had special magnesium alloy in some of its casings to save weight. Quote
Joseph Posted October 17, 2021 Posted October 17, 2021 All the removable cases on a RF900 are magnesium too. Quote
beam Posted October 19, 2021 Posted October 19, 2021 750 '91 (m) engine , no carbs , no starter , no alternator , no oil is 67kg well that is what mine is on the bathroom scales 3 Quote
DuckNorris Posted October 19, 2021 Author Posted October 19, 2021 1 hour ago, beam said: 750 '91 (m) engine , no carbs , no starter , no alternator , no oil is 67kg well that is what mine is on the bathroom scales You champion. Cheers mate, very helpful indeed. Quote
fatblokeonbandit Posted October 20, 2021 Posted October 20, 2021 (edited) 1200 engine without carbs 77kg Edited October 20, 2021 by fatblokeonbandit 7 Quote
DuckNorris Posted October 22, 2021 Author Posted October 22, 2021 On 10/20/2021 at 4:32 PM, fatblokeonbandit said: 1200 engine without carbs 77kg God I've missed this forum. Top work mate, very much appreciated. Quote
fatblokeonbandit Posted October 22, 2021 Posted October 22, 2021 4 hours ago, DuckNorris said: God I've missed this forum. Top work mate, very much appreciated. No worries shipmate, the doctor says the hernia should pop back in 1 Quote
DuckNorris Posted October 22, 2021 Author Posted October 22, 2021 51 minutes ago, fatblokeonbandit said: No worries shipmate, the doctor says the hernia should pop back in Shipmate as a generic friendly address or you matelot? If it makes you feel any better, I have an EFE engine here to shift at some point and apparently they're at least 10kg more than your lump! Quote
fatblokeonbandit Posted October 22, 2021 Posted October 22, 2021 Ex Matelot, 1977- 2000 stoker then Tiff, Yo Ho.. Quote
DuckNorris Posted October 22, 2021 Author Posted October 22, 2021 41 minutes ago, fatblokeonbandit said: Ex Matelot, 1977- 2000 stoker then Tiff, Yo Ho.. I'm 2009-still going. WAFU Quote
fatblokeonbandit Posted October 23, 2021 Posted October 23, 2021 12 hours ago, DuckNorris said: I'm 2009-still going. WAFU Good man Quote
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